The Universal Kinship

The Physical Kinship

I. Man an Animal.

It was in the zoology class at college. We had made all the long journey from amoeba to coral, from coral to worm, from worm to mollusk, from mollusk to fish, from fish to reptile, and from reptile to mammal—and there, in the closing pages of faithful old Packard, we found it. ‘A mammal of the order of primates,’ the book said, with that unconcern characteristic of the deliverances of science. I was almost saddened. It was the first intimation I had ever received of that trite but neglected truth that man is an animal.

But the intimation was so weak, and I was at that time so unconscious, that it was not till years later that I began, through reflection, actually to realise the truth here first caught sight of. During these years I knew that man was not a mineral nor a plant—that, indeed, he belonged to the animal kingdom. But, like most men still, I continued to think of him as being altogether different from other animals. I thought of man and the animals, not of man and the other animals. Man was somehow sui generis. He had had, I believed, a unique and miraculous origin; for I had not yet learned of organic evolution. The pre-Darwinian belief that I had come down from the skies, and that non-human creatures of all kinds had been brought into existence as adjuncts of the distinguished species to which I belonged, occupied prominent place in my thinking. Non-human races, so I had been taught, had in themselves no reason for existence. They were accessories. A chasm, too wide for any bridge ever to span, yawned between the human and all other species. Man was celestial, a blue-blood barely escaping divinity. All other beings were little higher than clods. So faithfully and mechanically did I reflect the bias in which I had grown up.

But man is an animal. It was away out there on the prairies, among the green corn rows, one beautiful June morning—a long time ago it seems to me now—that this revelation really came to me. And I repeat it here, as it has grown to seem to me, for the sake of a world which is so wise in many things, but so darkened and wayward regarding this one thing. However averse to accepting it we may be on account of favourite traditions, man is an animal in the most literal and materialistic meaning of the word. Man has not a spark of so-called ‘divinity’ about him. In important respects he is the most highly evolved of animals; but in origin, disposition, and form he is no more ‘divine’ than the dog who laps his sores, the terrapin who waddles over the earth in a carapace, or the unfastidious worm who dines on the dust of his feet. Man is not the pedestalled individual pictured by his imagination—a being glittering with prerogatives, and towering apart from and above all other beings. He is a pain-shunning, pleasure-seeking, death-dreading organism, differing in particulars, but not in kind, from the pain-shunning, pleasure-seeking, death-dreading organisms below and around him. Man is neither a rock, a vegetable, nor a deity. He belongs to the same class of existences, and has been brought into existence by the same evolutional processes, as the horse, the toad that hops in his garden, the firefly that lights its twilight torch, and the bivalve that reluctantly feeds him.

Man’s body is composed fundamentally of the same materials as the bodies of all other animals. The bodies of all animals are composed of clay. They are formed of the same elements as those that murmur in the waters, gallop in the winds, and constitute the substance of the insensate rocks and soils. More than two-thirds of the weight of the human body is made up of oxygen alone, a gas which forms one-fifth of the weight of the air, more than eight-ninths of that of the sea, and forty-seven per cent, of the superficial solids of the earth.

Man’s body is composed of cells. So are the bodies of all other animals. And the cells in the body of a human being are not essentially different in composition or structure from the cells in the body of the sponge. All cells are composed primarily of protoplasm, a compound of carbon, hydrogen, nitrogen, and oxygen. Like all other animals, man is incapable of producing a particle of the essential substance of which his body is made. No animal can produce protoplasm. This is a power of the plant, and the plant only. All that any animal can do is to burn the compounds formed in the sun-lit laboratories of the vegetable world. The human skeleton, like the skeletons of nearly all other animals, is composed chiefly of lime—lime being, in the sea, where life spent so many of its earlier centuries, the most available material for parts whose purpose it is to furnish shape and durability to the organism. Man grows from an egg. So do all creatures of clay. Every animal commences at the same place—in a single, lowly, almost homogeneous cell. A dog, a frog, a philosopher, and a worm cannot for a long time after their embryonic commencement be distinguished from each other. Like the oyster, the ox, the insect, and the fish, like all that live, move, and breathe, man is mortal. He increases in size and complexity through an allotted period of time; then, like all his kindred, wilts back into the indistinguishable flux from which he came. Man inhales oxygen and exhales carbon dioxide. So does every animal that breathes, whether it breathe by lungs, gills, skin, or ectosarc, and whether it breathe the sunless ooze of the sea floor or the ethereal blue of the sky. Animals inhale oxygen because they eat carbon and hydrogen. The energy of all animals is produced mainly by the union of oxygen with the elements of carbon and hydrogen in the tissues of animal bodies, the plentiful and ardent oxygen being the most available supporter of the combustion of these two elements.

Man is, then, an animal, more highly evolved than the most of his fellow-beings, but positively of the same clay, and of the same fundamental make-up, with the same eagerness to exceed and the same destiny, as his less pompous kindred who float and frolic and pass away in the seas and atmospheres, and creep over the land-patches of a common clod.

II. Man a Vertebrate.

Man is a vertebrate animal.^[1] He has (anatomically at least) a backbone. He belongs to that substantial class of organisms possessing an articulating internal skeleton—the family of the fishes, amphibians, reptiles, birds, and mammals. Most animals have some sort of skeleton, some sort of calcareous contrivance, whose business it is to give form and protection to the softer parts of the organism. Some animals, as the starfishes, have plates of lime scattered throughout the surface parts of the body; others, as the corals and sponges secrete plant-like frames, upon and among the branches of which the organisms reside; and still others, as the clams, crustaceans, and insects, have skeletons consisting of a shell or sheath on the outside of, and more or less surrounding, the softer substances of the body. The limbs of insects are tiny tubes on the inside of which are the miniature muscles with which they perform their marvels of locomotion. The skeleton of vertebrates, consisting of levers, beams, columns, and arches, all skilfully joined together and sunk deep within the muscular tissue, forms a conspicuous contrast to the rudimentary frames of other animals. The vertebrate skeleton consists of a hollow axis, divided into segments and extending along the dorsal region of the body, from the ventral side of which articulate, by means of awkwardly-constructed girdles, an anterior and a posterior pair of limbs. This dorsal axis ends in front in a peculiar bulbous arrangement called the head, which contains, among other valuables, the brain and buccal cavern. The thoracic segments of the backbone send off pairs of flat bones, which, arching ventrally, form the chest for the protection of the heart and other vitals. The limbs (except in fishes) consist each of a single long bone, succeeded by two long bones, followed by two transverse rows of short, irregular wrist or ankle bones, ending normally in five branching series of bones called digits. This is essentially the skeleton of all fishes, amphibians, reptiles, birds, and mammals. In short, it is the universal vertebrate type of frame. There are minor modifications to suit the various kinds of environment, adaptations to the necessities of aquatic, terrestrial, and aerial locomotion and life, some parts being specialised, others atrophied, and still others omitted, but there is never anywhere, from fishes to philosophers, any fundamental departure from the established vertebrate type of skeleton.^[2] The pectoral fins of fishes correspond to the fore-limbs of frogs and reptiles, the wings of birds, and the arms of men. The pelvic fins of fishes are homologous with the hind-limbs of frogs, reptiles, and quadrupeds, and the legs of birds, apes, and men. The foot of the dog and crocodile, the hand of the orang, and the flipper of the dolphin and seal, all have the same general structure as the hand of man; and the wings of the bat and bird, the forelimbs of the lizard and elephant, and the comical shovels of the mole and ornithorhynchus, notwithstanding the great differences in their external appearance and use, contain essentially the same bones and the same arrangement of the bones as do the arms of men and women. The human body has two primary cavities in it. So have the bodies of all vertebrates: a neural cavity containing the brain and spinal cord, and a visceral cavity containing the heart, liver, lungs, and alimentary canal. Invertebrates have only one body cavity—the one corresponding to the visceral cavity of vertebrates—and the main nerve trunk, instead of extending along the back, as among vertebrates, is in invertebrates located ventrally. Vertebrates are the only animals on the earth that have a highly developed circulatory system, a system entirely shut off from the other systems, and containing a heart, arteries, veins, and capillaries. In all invertebrates the digestive and circulatory systems remain to a greater or less extent connected, the blood and food mingling more or less in the general cavity of the body. Worms and insects have pulsating tubes instead of heart and arteries. Crustaceans have hearts with one chamber, and mollusks have two or three chambered hearts, but the blood, instead of returning to the heart after its journey through the arteries, passes into the body cavity. In man and other vertebrates the circulating current is confined strictly to the bloodvessels, no particle of it ever escaping into the general body cavity. The heart of vertebrates is distinguished from that of invertebrates by being located ventrally. The heart of invertebrates is in the back. The blood of vertebrates differs from that of invertebrates in containing both red and white corpuscles. Invertebrates have white corpuscles only. Worms have yellow, red, or bright green blood. The blood of crustaceans is bluish, that of mollusks is white, and that of insects dusky or brown. The blood of all vertebrates, excepting amphioxus, is red. All backboned beings, whether they dwell in seas or cities, and whether they build nests or empires, have two eyes, two ears, nose and mouth, all located in the head, and always occupying the same relative position to each other. Invertebrates may have their brains in their abdomen, as do the mites; hear with their legs or antennae, as many insects do; see with their tunics, like the scallops; and breathe with their skin, as do the worms. The crayfish hears with its ‘feelers,’ the cricket and katydid with their fore-legs, the grasshopper with its abdomen, the clam with its ‘foot,’ and mysis and other low crustaceans have their auditory organs on their tails.

Man is, then, like the fishes, frogs, reptiles, birds, and quadrupeds, a vertebrate animal. Excepting in his infancy, when he is a quadruped going on all fours, he uses his posterior limbs only for locomotion, and his anterior for prehension and the like. His spinal axis is erect instead of horizontal, and his tail is atrophied. But he possesses all of the unmistakable qualities of the vertebrate type of structure—a two-chambered body cavity, a highly developed and dorsally located nerve trunk, vertebrate vitals, a closed circulatory system, a ventral heart, red blood, a head containing sense organs and brain, and a well-ordered internal skeleton, consisting of a vertebral column with skull and ribs and two pairs of limbs, the limbs consisting each of one long bone, two long bones, two transverse rows of irregular bones, and five branches at the end.

[1.] See ‘Classes of Animals,’ at the end of the chapter.
[2.] Snakes are limbless, and hind-limbs are lacking in whales and other degenerates; but rudimentary limbs are found in the embryonic stages of these animals. Frogs, it may be said also, have no ribs.

III. Man a Mammal.

Man is a mammal. He belongs to the most brilliant and influential of the five classes of vertebrates—the class to which belong so many of his associates and victims, the class to which belong the horse, the dog, the deer, the ox, the sheep, the swine, the squirrel, the camel, the unattenuated elephant, and the timid-hearted hare. To this class belong also the lion, the tiger, the kangaroo, the beaver, the bear, the bat, the monkey, the mole, the wolf, the ornithorhynchus, and the whale—in short, all animals that have hair. Fishes and reptiles have scales; birds have feathers; all mammals are covered to a greater or less extent with hair. The aquatic habits of whales render hair of no use to them. Hence, while the unborn of these animals still cling to the structural traditions of their ancestors and are covered with hair, the adults are almost hairless. The sartorial habits of human beings and the selective influences of the sexes have had a similar effect on the hairy covering of the human body. Hair exists all over the human body surface, excepting on the soles of the hands and feet, but in a greatly dwarfed condition. It is only on the scalp and on the faces of males, where it is scientifically assisted for purposes of display, that it grows luxuriantly. It is by no means certain that even the hair on the masculine scalp will last forever. For if the hermetical derby and other deadly devices worn by men continue their devastations as they have in the past, we may expect to have, in the course of generations, men with foreheads reaching regularly to the occiput. Most animals lay eggs. Man does not. Like the dog, the horse, the squirrel, and the bat, man is viviparous, the eggs hatching within the parental body. Human young are born helpless, and are sustained during the period of their infancy by the secretions of the milk glands. So are all the sons and daughters of mammals. Whether they come into the world among the waters or among the desert sands, in the hollow of a tree, in a hole in the earth, or in a palace, the children of mammals are frail and pitiful, and they survive to grow and multiply only because they are the object of the loving and incessant sacrifices of a mother.

Mammals are distinguished from all other animals by the possession of two kinds of skin glands—the sweat glands and the oil glands—and by the development of certain of these glands in the female into organs for the nourishing of the young. Among reptiles and birds the lower jaw is suspended from the skull by a bone called the quadrate bone. Among men and other mammals the lower jaw is joined directly to the skull, the quadrate bone becoming, in the vicissitudes of evolution, the hammer (malleus) of the mammalian ear. Man has a four-chambered heart—two reservoirs which receive, and two pumps which propel, the scarlet waters of the body. Fishes have two-chambered hearts; frogs and most reptiles have three-chambered hearts; all mammals and birds have four-chambered hearts. The red corpuscles in the blood of fishes, frogs, reptiles, and birds, are discs, double-convex, nucleated, and in shape oval or triangular. In man and in all other mammals (except the archaic camel) the red corpuscles are double-concave, non-nucleated, and circular. ‘Man has a diaphragm dividing the body cavity into chest and abdomen, and a shining white bridge of interlacing fibres, called corpus callosum, uniting his cerebral hemispheres. And man is a mammal because, like other mammals, he has, in addition to the qualities already mentioned, these valuable and distinct characteristics.

IV. Man a Primate.

Man is a primate. There are four divisions in the order of primates—lemurs, monkeys, apes, and men. But the most interesting and important of these, according to man, is man. Man is a primate because, like other primates, he has arms and hands instead of fore-legs. And these are important characteristics. It was a splendid moment when the tendencies of evolution, pondering the possibilities of structural improvement, decided to rear the vertebrate upon its hind-limbs, and convert its anterior appendages into instruments of manipulation. So long as living creatures were able simply to move through the airs and waters of the earth and over the surface of the solids, they were powerless to modify the universe about them very much. But the moment beings were developed with parts of their bodies fitted to take hold of and move and fashion and compel the universe around them, that moment the life process was endowed with the power of miracles. With the invention of hands and arms commenced seriously that long campaign against the tendencies of inanimate nature which finds its most marvellous achievements in the sustained and triumphant operations of human industry. None of the primates excepting man use their hind-limbs as a sole means of changing their place in the universe, but in all of them the fore-limbs are regularly used as organs of manipulation. Man is a primate because his fingers and toes, like those of other primates (except the tiny marmosets of Brazil), end in nails. Man has neither claws to burrow into the earth, talons with which to hold and rend his victims, nor hoofs to put thunder into his movements. The human stomach, like that of all the other primates, is a bagpipe. The stomach of the carnivora is usually a simple sack, while rodents have, as a rule, two stomachs, and ruminants four. Man is a primate because his milk glands are located on the breast and are two in number. The mammary glands vary in number in the different orders of mammals, from two in the horse and whale to twenty-two in some insectivora. Most ruminating animals have four, swine ten, and carnivora generally six or eight. These glands may be located in the region of the groin, as in the horse and whale; between the forelimbs, as in the elephant and bat; or arranged in pairs extending from the fore to the hind limbs, as in the carnivora and swine. In man and all other primates (except lemurs) the mammary glands are pectoral and two in number. All primates, including man, have also a disc-shaped placenta. The placenta is the organ of nutrition in mammalian embryos. It is found in all young-bearing animals above the marsupials, and consists of a mass of glands between the embryo and the parental body. In some animals it entirely surrounds and encloses the embryo; in others it assumes the form of a girdle; and in still others it is bell-shaped. The primates are the only animals in which this peculiar organ is in the shape of a simple disc.^[1]

The nearest relatives by blood man has in this world are the exceedingly man-like apes—the tailless anthropoids—the gorillas and chimpanzees of Africa, and the orangs and gibbons of southern and insular Asia. The fact that man is an actual relative and descendant of the ape is one of the most disagreeable of the many distasteful truths which the human mind in its evolution has come upon. To a vanity puffed, as is that of human beings, to the splitting, the consanguinity of gorilla and gentleman seems horrible. Man prefers to have arrived on the earth by way of a ladder let down by his imagination from the celestial concave. Within his own memory man has been guilty of many foolish and disgraceful things. But this attempt by him to repudiate his ancestors by surreptitiously fabricating for himself an origin different from, and more glorious than the rest is one of the most absurd and scandalous in the whole list. It is a shallow logic—the logic of those who, without worth of their own, try to shine with a false and stolen lustre. No more masterly rebuke was ever administered to those in the habit of sneering at the truth in this matter than the caustic reply of Huxley to the taunt of the fat-witted Bishop—that he would rather be the descendant of a respectable ape than the descendant of one who not only closed his eyes to the facts around him, but used his official position to persuade others to do likewise. Man’s reluctance to take his anatomical place beside his simian kinspeople has been exceeded only by his selfish and high-handed determination to exclude all other terrestrial beings from his heaven.

Man is a talkative and religious ape. He is an ape, but with a much greater amount of enterprise and with a greater likelihood of being found in every variety of climate. Like the anthropoid, man has a bald face and an obsolete tail. But he is distinguished from his arboreal relative by his arrogant bearing, his skilled larynx, and especially by the satisfaction he experiences in the contemplation of the image which appears when he looks in a mirror.

The man-like apes are from three to six feet tall, and are all of them very strong, the gorilla, who sometimes weighs over three hundred pounds, being about the bravest and most formidable unarmed animal on the planet. They are erect or semi-erect, have loud voices, plantigrade feet, and irritable dispositions—in all of these particulars being strikingly like men. The gorilla, chimpanzee, and gibbon are highlanders, preferring the uplands and mountains. The orang is a lowlander, living phlegmatically among the sylvan swamps of Sumatra and Borneo. The gorilla and chimpanzee are terrestrial, seldom going among the trees except to get food or to sleep. The orang and gibbon are arboreal, seldom coming to the ground except to drink or bathe. They all walk on their hind-limbs, generally in a stooping posture, with their knuckles or fingers touching the ground. But they sometimes walk with their arms hanging down by their sides, and sometimes with their hands clasped back of their heads to give them balance. None of them ever place their palms on the ground when they walk—that is, none of them walk on four feet. The anthropoid races, in the shape of their heads and faces and in the general form and structure of their bodies, and even in their habits of life, resemble in a remarkable manner the lowest races of human beings. This resemblance is recognised by the negro races, who call the gorilla and chimpanzee ‘hairy men,’ and believe them to be descendants of outcast members of their own species.

There are differences in structure between man and the apes, just as there are differences in structure between the Caucasian and the Caffre, or even between individual Caucasians or individual Caffres. There are differences in structure and topography, often very noticeable differences, even among members of the same family. But in all of its essential characters, and extending often to astonishing particulars, the structure of man is identical with that of the anthropoid.^[2]

In external appearances the man-like races differ from men in having a luxuriant covering of natural hair. But anthropoids differ very much among themselves in this particular. The orang, usually covered with long hair, is sometimes almost hairless. There are, too, races of human beings whose bodies are covered with a considerable growth of hair. The Todas (Australians) and Ainus (aborigines of Japan) are noted for the hairiness of their bodies, certain individuals among them being covered with a real fur, especially on the lower limbs.^[3]

Individuals also often appear in every race with a remarkable development of the hair. Adrian and his son Fedor, exhibited years ago over Europe as ‘dog-men,’ are examples. The father was completely covered with a thick growth of fine dirty-yellow hair two or three inches long. Long tufts grew out of his nostrils and ears, giving him a striking resemblance to a Skye terrier. Fedor, and also his sister, were covered with hair like the father, but another son was like ordinary men. The man-like races have also longer arms in proportion to the height of the body than man generally has. But this is also true of human infants and negroes. The gibbon has relatively much longer arms than the other anthropoids. It differs from the chimpanzee in this respect more than the chimpanzee differs from man. When standing upright and reaching down with the middle finger, the gibbon can touch its foot, while the chimpanzee can reach only to the knee. Man ordinarily reaches part way down the thigh, but negroes have been known to have arms reaching to the knee-pan.^[4]

The skeleton of the African races contains many characters recognised by osteologists as ‘pithecoid,’ or ape-like. It is massive, the flat bones are thick, and the pelvis narrow. In the manlike apes the large toe is opposable to the other four, and is used by them much as the thumb is used. But this difference between the two races of beings is just what might be expected from the differences in their modes of life. Man has little need of this opposability on account of his exclusively terrestrial life, while to the ape it is indispensable on account of his arboreal environment and life. ‘But there are,’ says Haeckel, ‘wild tribes of men who can oppose the large toe to the other four just as if it were a thumb, and even new-born infants of the most highly-developed races of men can grasp as easily with their hind-hands as with their forehands. Chinese boatmen row with their feet, and Bengal workmen weave with them. The negro, in whom the big toe is freely movable, seizes hold of the branches of trees with it when climbing, just like the four-handed apes’.^[5]

Many men have lost their arms by accident and have learned to use their feet as hands with wonderful skill. Not many years ago there died in Europe an armless violinist who had during his lifetime played to cultured audiences in most of the capitals of the world. Some of the most accomplished of penmen hold their pen between their toes. The man-like apes live to about the same age as man, and all of them, like man, have beards. The anthropoid beard, too, like the human, appears at the age of sexual maturity. The human beard often differs in colour from the hair of the scalp, and whenever it does it has been observed to be invariably lighter—never darker—than the hair on the scalp. This is true among all races of men. The same rule and the same uniformity exists among anthropoids. The races of mankind are divided into two primary groups depending upon the shape of the head and the character of the hair: the short-headed races (Brachycephali), such as the Malays, Mongols, and Aryans, with round or oval faces, straight hair, and vertical profiles; and the long-headed races (Dolichocephali), with woolly hair and prognathous faces, such as the Papuans and Africa races. The skin of the short-headed races is orange or white, while the skin and hair of the long-headed races are glossy black.

It is, at least, interesting that the orang and gibbon, who live in Asia and its islands, where the brachycephalic races of men supposedly arose, are themselves brachycephalic; and that the gorilla and chimpanzee, who live in Africa, where the dolichocephalic races chiefly live, are dolichocephalic. The gorilla and chimpanzee also have, like the men and women of Africa, black skin and hair; while the hair of the orang is a reddish-brown, and its skin sometimes yellowish-white. The dentition of the anthropoids and men is in all essentials identical. They all have two sets of teeth: a set of milk-teeth, twenty in number, and thirty-two permanent teeth, the permanents consisting of two incisors, one canine, two premolars, and three molars, in each half-jaw. Man has ordinarily twelve pairs of ribs and thirty-two vertebrae. So has the orang. The other anthropoids have thirteen pairs of ribs. But the number of ribs in both human and anthropoid beings is not uniform, man occasionally having thirteen pairs, and the gorilla fourteen. Man has also the same number of caudal vertebrae in his rudimentary tail as the anthropoid has. The hands and feet of anthropoids, bone for bone and muscle for muscle, correspond with those of men, no greater structural differences existing than among different species of men. The human foot has three muscles not found in the human hand—a short flexor muscle, a short extensor muscle, and a long muscle extending from the fibula to the foot. All of these muscles are found in the anthropoid foot just as in the foot of man. There are also the same differences between the arrangement of the bones of the anthropoid wrist and ankle as between the wrist and ankle bones of man. Whatever set of anatomical particulars may be selected, whether it be hands, arms, feet, muscles, skull, viscera, ribs, or dentition, it is found that the anthropoid races and men are in all essentials the same. The differences are such as have arisen as a result of different modes of life, and such as exist between different tribes of either group of animals.

‘The structural differences which separate man from the gorilla and chimpanzee,’ says Huxley, in summing up the conclusion of his brilliant inquiry into ‘Man’s Place in Nature,’ ‘are not so great as those which separate the gorilla from the lower apes.’

‘The body of man and that of the anthropoid are not only peculiarly similar,’ says Haeckel, ‘but they are practically one and the same in every important respect. The same two hundred bones, in the same order and structure, make up our inner skeleton; the same three hundred muscles effect our movements; the same hair clothes our skin; the same four-chambered heart is the central pulsometer in our circulation; the same thirty-two teeth are set in the same order in our jaws; the same salivary, hepatic, and gastric glands compass our digestion; the same reproductive organs insure the maintenance of our race’.^[6]

‘Not being able,’ says Owen in his paper on ‘The Characters of Mammalia,’ ‘to appreciate or conceive of the distinction between the psychical phenomena of a chimpanzee and of a Boschisman or of an Aztec with arrested brain-growth, as being of a nature so essential as to preclude a comparison between them, or as being other than a difference in degree, I cannot shut my eyes to the significance of that all-pervading similitude of structure—every tooth, every bone, strictly homologous—which makes the determination of the difference between Homo and Pithecus the anatomist’s difficulty.’

‘If before the appearance of man on the earth,’ says Ward in his ‘Dynamic Sociology,’ ‘an imaginary painter had visited it, and drawn a portrait embodying the thorax of the gibbon, the hands and feet of the gorilla, the form and skull of the chimpanzee, the brain development of the orang, and the countenance of Semnopithecus, giving to the whole the average stature of all of these apes, the result would have been a being not far removed from our conception of the primitive man, and not widely different from the actual condition of certain low tribes of savages. The brain development would perhaps be too low for the average of any existing tribe, and would correspond better with that of certain microcephalous idiots and cretins, of which the human race furnishes many examples.’

And it is not true, as is commonly supposed, that, after all other resemblances between the human and anthropoid structures have been made out, there still exists somewhere some undistinguishable difference in the organic structure of their brains. All differences in structure from time to time suspected or asserted to exist between the brain of man and that of the man-like apes have been one after another completely swept away. And it is now known to all neurologists that the human and anthropoid brains differ structurally in no particulars whatever, both of them containing the same lobes, the same ventricles and cornua, and the same convolutional outline. Even the posterior lobe, the posterior cornu, and the hippocampus minor, so long triumphantly asserted to be characteristic features of the human brain, have been pitilessly identified in all anthropoids by the profound and terrible Huxley. There is not an important fold or fissure in the brain of man that is not found in the brain of the anthropoid. ‘The surface of the brain of a monkey,’ says Huxley, ‘exhibits a sort of skeleton map of man’s, and in the man-like apes the details become more and more filled in, until it is only in minor characters that the chimpanzee’s or the orang’s brain can be structurally distinguished from man’s’.^[7]

The great difference physically between man and the anthropoids, aside from man’s talented larynx and erect posture, lies in man’s abnormal cranial capacity. The normal human cranium never contains less than 55 cubic inches of space, while the largest gorilla cranium contains only 34½ cubic inches. This is a difference of 20½ cubic inches. And 20½ cubic inches of thinking matter is an alarming amount to be lacking in a single individual. But this cranial gap between gorilla and man is deprived of some of its significance by the fact that human crania sometimes measure 114 cubic inches, making a difference between the smallest and largest human brains of 59 cubic inches. The difference between the gorilla and the savage in cranial capacity is, therefore, only about one-third as great as the cranial chasm between the savage and the sage.

[1.] The bat and a few other animals have a disc-like placenta, but it develops into the disc shape by a different route from what it does in the primates.
[2.] Hartmann: Anthropoid Apes; New York, 1901.
[3.] Quatrefages: The Human Species; New York, 1898.
[4.] Tyler: Anthropology; New York; 1899.
[5.] Haeckel: History of Creation, 2 vols.; New York, 1896.
[6.] Haeckel: The Riddle of the Universe; New York, 1901.
[7.] Huxley: Man’s Place in Nature; New York, 1883.

V. Recapitulation.

The anatomical gulf between men and apes does not exist. There are, in fact, no gulfs anywhere, only gradations. All chasms are completely covered by unmistakable affinities, in spite of the fact that the remains of so many millions of deceased races lie hidden beneath seas or everlastingly locked in the limy bosoms of the continents. There are closer kinships and remoter kinships, but there are kinships everywhere. The more intimate kinships are indicated by more definite and detailed similarities, and the more general relationships by more fundamental resemblances. All creatures are bound to all other creatures by the ties of a varying but undeniable consanguinity.

Man stands unquestionably in the primate order of animals, because he has certain qualities of structure which all primates have, and which all other animals have not: hands and arms and nails, a bagpipe stomach, great subordination of the cerebellum, a disc-like placenta, teeth differentiated into incisors, canines, and molars, and pectoral milk glands.

Man is more closely akin to the anthropoid apes than to the other primates on account of his immense brain, his ape-like face, his vertical spine, and in being a true two-handed biped. The manlike apes and men have the same number and kinds of teeth, the same limb bones and muscles, like ribs and vertebrae, an atrophied tail, the same brain structure, and a suspicious similarity in looks and disposition. Men and anthropoids live about the same number of years, both being toothless and wrinkled in old age. The beard, too, in both classes of animals appears at the same period of life and obeys the same law of variation in colour. Even the hairs on different parts of the bodies of men and anthropoids, as on the arms, incline at a like angle to the body surface. The hair on the upper arm and that on the forearm, in both anthropoids and men, point in opposite directions—toward the elbow. This peculiarity is found nowhere in the animal kingdom excepting in a few American monkeys.

Man’s mammalian affinities are shown in his diaphragm, his hair, his four-chambered heart, his corpus callosum, his non-nucleated blood-corpuscles, and his awkward incubation.

The fishes, frogs, reptiles, birds, and non-human mammals are human in having two body cavities, segmented internal skeletons, two pairs of limbs, skulls and spinal columns, red blood, brains, and dorsal cords; and in possessing two eyes, two ears, nostrils, and mouth opening out of the head. And finally all animals, including man, are related to all other animal forms by the great underlying facts of their origin, structure, composition, and destiny. All creatures, whether they live in the sea, in the heavens, or in subterranean glooms; whether they swim, fly, crawl, or walk; whether their world is a planet or a water-drop; and whether they realise it or not, commence existence in the same way, are composed of the same substances, are nourished by the same matters, follow fundamentally the same occupations, all do under the circumstances the best they can, and all arrive ultimately at the same pitiful end.

VI. The Meaning of Homology.

The similarities and homologies of structure existing between man and other animals, and between other animals and still others, are not accidental and causeless. They are not resemblances scattered arbitrarily among the multitudinous forms of life by the capricious levities of chance. That all animals commence existence as an egg and are all made up of cells composed of the same protoplasmic substance, and all inhale oxygen and exhale carbon dioxide, and are all seeking pleasure and seeking to avoid pain, are more than ordinary facts. They are filled with inferences. That vertebrate animals, differing in externals as widely as herring and Englishmen, are all built according to the same fundamental plan, with marrow-filled backbones and exactly two pairs of limbs branching in the same way, is an astonishing coincidence. That the wing of the bird, the foreleg of the dog, the flipper of the whale, and the fore-limb of the toad and crocodile, have essentially the same bones as the human arm has is a fact which may be without significance to blind men, but to no one else. The metamorphosis of the frog from a fish, of the insect from a worm, and of a poet from a senseless cell, are transformations simply marvellous in meaning. And it is not easy, since Darwin, to understand how such lessons could remain long unintelligible, even to stones and simpletons. Not many generations have passed, however, since these revelations, now so distinct and wonderful, fell on the listless minds of men as ineffectually as the glories of the flower fall on the sightless sockets of the blind.

It is hardly two generations since the highest intelligences on the earth conceived that not only the different varieties of men—the black, the white, and the orange—but all the orders and genera of the animal world, and not only animals, but plants, had all been somehow simultaneously and arbitrarily brought into existence in some indistinct antiquity, and that they had from the beginning all existed with practically the same features and in approximately the same conditions as those with which and in which they are found to-day. The universe was conceived to be a fixed and stupid something, born as we see it, incapable of growth, and indulging in nothing but repetitions. There were no necessary coherencies and consanguinities, no cosmical tendencies operating eternally and universally. All was whimsical and arbitrary. It was not known that anything had grown or evolved. All things were believed to have been given beginning and assigned to their respective places in the universe by a potential and all-clever creator. The serpent was limbless because it had officiously allowed Eve to include in her dietary that which had been expressly forbidden. The quadruped walked with its face towards the earth as a structural reminder of its subjection to the biped, who was supposed to be especially skilled in keeping his eyes rolled heavenward. The flowers flung out their colours, not for the benefit of the bugs and bees, and the stars paraded, not because they were moved to do so by their own eternal urgings, but because man had eyes capable of being affected by them. Man was an erect and featherless vertebrate because his hypothetical maker was erect and featherless. (I wonder whether, if a clam should conceive a creator, it would have the magnanimity to make him an insect or a vertebrate, or anything other than a great big clam.)

VII. The Earth an Evolution.

The world now knows—at least, the scientific part of it knows—that these things are not true, that they are but the solemn fancies of honest but simple-minded ancients who did the best they could in that twilight age to explain to their inquiring instincts the wilderness of phenomena in which they found themselves. The universe is a process. It is not petrified, but flowing. It is going somewhere. Everything is changing and evolving, and will always continue to do so. The forms of life, of continents and oceans, and of streams and systems, which we perceive as we open our senses upon the world to-day, are not the forms that have always existed, and they are not the forms of the eternal future. There was a time, away in the inconceivable, when there was no life upon the earth, no solids, and no seas. The world was an incandescent lump, lifeless and alone, in the cold solitudes of the spaces. There was a time—there must have been a time—when life appeared for the first time upon the earth, simple cellules without bones or blood, and without a suspicion of their immense and quarrelsome posterity. There was a time when North America was an island, and the Alleghany Mountains were the only mountains of the continent. The time was—in the coal-forming age—when the Mississippi Valley, from the Colorado Islands to the Alleghanies, was a vast marsh or sea, choked with forests of equisetum and fern, and swarming with gigantic reptiles now extinct. There was a time when palms grew in Dakota, and magnolias waved in the semi-tropical climate of Greenland and Spitzbergen. There was a time when there were no Rocky Mountains in existence, no Andes, no Alps, no Pyrenees, and no Himalayas. And that time, compared with the vast stretches of geological duration, was not so very long ago, for these mountains are all young mountains. The time was when Jurassic saurians—those repulsive ruffians of that rude old time—represented the highest intelligence and civilisation of the known universe. There were no men and women in the world, not even savages, when our ape-like forefathers wandered and wondered through the awesome silences of primeval wilds; there were no railroads, steamboats, telegraphs, telephones, typewriters, harvesters, electric lights, nor sewing machines; no billionaires nor bicycles, no socialists nor steam-heat, no ‘watered stock’ nor ‘government by injunction,’ no women’s clubs, captains of industry, labour unions, nor ‘yellow perils’—there was none of these things on the earth a hundred years ago. All things have evolved to be what they are—the continents, oceans, and atmospheres, and the plants and populations that live in and upon them.

There will come a time, too, looking forward into the future, when what we see now will be seen no more. As we go backward into the past, the earth in all of its aspects rapidly changes; the continents dwindle, the mountains melt, and existing races and species disappear one after another. The farther we penetrate into the past, the stranger and the more different from the present does everything become, until finally we come to a world of molten rocks and vapourised seas without a creeping thing upon it. As it has been in the past so will it be in time to come. The present is not everlasting. The minds that perceive upon this planet a thousand centuries in the future will perceive a very different world from that which the minds of this day perceive—different arts, animals, events, ideals, geographies, sciences, and civilisations. The earth seems fixed and changeless because we are so fleeting. We see it but a moment, and are gone. The tossing forest in the wrath of the storm is motionless when looked at by a flash of lightning. The same tendencies that have worked past changes are at work to-day as tirelessly as in the past. By invisible chisels the mountains are being sculptured, ocean floors are lifting, and continents are sinking into the seas. Species, systems, and civilisations are changing, some crumbling and passing away, others rising out of the ruins of the departed. Mighty astronomical tendencies are secretly but relentlessly at work, and immense vicissitudes are in store for this clod of our nativity. The earth is doomed to be frozen to death. In a few million years, according to astronomers, the sun will have shrunken to a fraction of his present size, and will have become correspondingly reduced in heat-giving powers. It is estimated that in twelve or fifteen million years the sun, upon whose mighty dispensations all life and activity on the earth are absolutely dependent, will become so enfeebled that no form of life on the earth will be possible. The partially-cooled earth itself is giving up its internal warmth, and will continue to give it up until it is the same temperature as the surrounding abysms, which is the frightful negative of something like 270 centigrade degrees. These are not very cheerful facts for those who inhabit the earth to contemplate. But they that seek the things that cheer must seek another sphere. No power can stay the emaciation of suns or the thievery of enveloping immensities. Old age is inevitable. It is far off, but it is as certain as human decay, and as mournful. In that dreadful but inevitable time no living being will be left in this world; there will be no cities nor states nor vanities nor creeping things, no flowers, no twilights, no love, only a frozen sphere. The oceans that now rave against the rocky flanks of the continents will be locked in eternal immobility; the atmospheres, which to-day drive their fleecy flocks over the azure meads of heaven and float sweet sounds and feathered forms, will be, in that terrible time, turned to stone; the radiant woods and fields, the home of the myriads and the green play-places of the shadows, will, like all that live, move, and breathe, have rotted into the everlasting lumber of the elements. There will be no Europe then, no pompous philosophies, no hellish rich, and no gods. All will have suffered indescribable refrigeration. The earth will be a fluidless, lifeless, sunless cinder, unimaginably dead and desolate, a decrepit and pitiful old ruin falling endlessly among heartless immensities, the universal tomb of the activities.

The universe is an evolution. Change is as extensive as time and space. The present has come out of that which has been, and will enter into and determine that which is to be. Everything has a biography. Everything has evolved—everything—from the murmur on the lips of the speechless babe to the soul of the poet, and from the molecule to Jehovah.

VIII. The Factors of Organic Evolution.

The animal kingdom represents one of the two grand branches of the organic universe. It has been evolved—evolved in a manner as simple and straightforward as it is revolting. It has all been brought about by partiality or selection. Generations of beings have come into existence. The individual members of each generation have differed from each other—differed in size, strength, speed, colour, shape, sagacity, luck, and likelihood of life. No two beings, not even those born from the same womb, are in all respects identical. Hardships have come. They have come from the inanimate universe in the form of floods, fires, frosts, accidents, diseases, droughts, storms, and the like; from other species, who were competitors or enemies; and from unbrotherly members of the same species. Some have survived, but the great majority have perished. Only a fraction, and generally an appallingly small fraction, of each generation of a species have lived to maturity. The lobster lays 10,000 eggs in a season, yet the mortality is such that the number of lobsters do not increase from one year to another. The elephant is the slowest breeder of all animals, yet, if they should all live, the offspring of a single pair in 750 years would, according to Darwin, number nearly 19,000,000. It has been shown that at the normal rate of increase of English sparrows, if none were to die save of old age, it would take but twenty years for a single pair to give one sparrow to every square inch in the State of Indiana.^[1] A single cyclops (one of the humbler crustaceans) may have 5,000,000 descendants in a season. One aphis will produce 100 young, and these young will reproduce in like manner for ten generations in a season, when, if they should all live, there would be a quintillion of young. A female white ant, when adult, does nothing but lie in a cell and lay eggs. She lays 80,000 eggs a day regularly for several months. An oyster lays 2,000,000 eggs in a season, and if all these eggs came to maturity a few dozen oysters might supply the markets of the world. The tapeworm is said to produce the incredible number of 1,000,000,000 ova, and some of the humbler plants three times this number of spores. If each egg of the codfish should produce an adult, a single pair in twenty-five years would produce a mass of fish larger than the earth. Lower forms of life are even more prolific than the higher. Maupas said that certain microscopic infusorians which he studied multiplied so rapidly that, if they should continue to multiply for thirty-eight days, and all of them should live, any one of them would produce a mass of protoplasm as big as the sun.

Those of each generation that have died have been inferior, or unfitted to the environment in which they found themselves. Those that have survived have been superior, superior in something—bigness, cunning, courage, virtue, vitality, strength, speed, littleness, or ferocity—something that has related them advantageously to surrounding conditions. The surviving remnant of each generation have become the progenitors of the next generation, and have transmitted, or tended to transmit, to their offspring the qualities of their superiority. This winnowing has gone on in each generation of living beings during many millions of years—almost ever since life commenced to be on the earth. Some have continued themselves, and others have died childless. The environment of each species has been an immense sieve, and only the superior have gone through it. Different environments have emphasised different qualities of structure and disposition, and have thus given rise to permanent varieties in survival. These varieties, through the accumulated effects of many generations of selection, have diverged into species; species, after a still longer series of selections, have evolved into genera; genera have evolved into families; families into orders; and so on. In this simple, terrible manner have all the branches of organic beings (thanks to the horrors of a million ages) been brought into existence.

Variation, therefore, which furnishes variety in offspring; Heredity, which tends to perpetuate peculiarities by causing offspring to resemble more or less the characters of their parents; and Environment, which determines the character of the selections, are the three factors, and the only three factors, in organic evolution.

[1.] Jordan: Footnotes of Evolution; New York, 1898.

IX. The Evidences of Organic Evolution.

That the forms of life to-day found on the earth have come into existence by the evolution of the more complex forms from the simpler, and of these simpler forms from still simpler, through the ever-operating law of Selection, is a necessary conclusion from the following facts:

1. The existence in the animal world of all grades of structures, from the humblest possible protozoan, whose body consists of a single simple speck, to the most powerful and complex of mammals. There are estimated to be something like a million species of animals living on the earth to-day. There may be several times this number. These species are linked together by millions of varieties, and are so related to each other that they may be all gathered together into various genera; these genera may be grouped into families, the families into orders, and the orders into seven or eight great primary phyla. By taking existing species and adding to them the extinct species of the rocks, and placing them all according to their structural affinities, it is possible to arrange them in the form of a tree with the various phyla, orders, families, genera, and species, branching and rebranching from the main trunk. The existence of structures, so graduated as to render such an arrangement possible, is in itself suggestive of a common relationship and origin.

2. Evolution is suggested by the similarities and homologies of structure found throughout the animal kingdom. Some of these similarities and homologies have already been mentioned. They are everywhere—remoter and more fundamental, some of them, others closer and more detailed. To the untrained mind, which sees surfaces only, and not even surfaces well, the animal world is an interminable miscellany of forms. But to the biologist, who looks deeper and with immense acumen over the whole field of animal life, there are only seven or eight different types of structure in the entire animal world. These seven or eight types correspond with the primary classes, or phyla, into which animals are divided, viz., protozoa, sponges, celenterates, echinoderms, worms, mollusks, arthropods, and vertebrates. However widely the members of each of these great groups may differ among themselves in colour, size, habits of life, and the like, the members of each group all resemble each other fundamentally. Moles differ from monkeys, bats from men, and birds from crocodiles and toads. They differ enormously. But they are all vertebrates with red blood, double body cavities, backbones, two pairs of limbs, and five fingers on each limb. When they are looked at superficially, there is not much similarity between a water-strider and a butterfly or between a stag-beetle and a gnat. But they are all, in reality, built according to the same plan. Like all other insects, they have six legs, a sheath-like skeleton, and bodies characteristically divided into head, thorax, and abdomen. It is the same with all other great classes of beings. All worms resemble each other; and so do all mollusks, although they may differ in particulars as widely as nautiluses and clams. Echinoderms have a radiate structure, celenterates and sponges are vase-like in shape, and protozoa are one-celled. The differences in structure among the members of a group consist in different modifications of a fundamental type. Among the vertebrates the fore-limb may be an arm, a leg, a wing, a shovel, a flipper, or a fin. But in all cases it is the same organ—that is, the same implement modified to serve different ends. Take the mouth-parts of insects. In the grasshopper and cricket these parts are fitted for grinding; in the moths and butterflies they are fashioned into long tubes for sucking the sweets of flowers; in the mosquito they form an elaborate apparatus for drilling and drinking; and in the mayfly the mouth-parts, though present, are not used at all. In all of these animals these parts are essentially the same, although differing so much in their forms and purposes that the unscientific can scarcely be made to believe they are fundamentally alike. There is no fact more familiar to the biologist or more frequently met with in the fields of animal morphology than the fact that the same general type may be hammered into dozens, or hundreds, or even thousands, of different patterns by the incessant industry of its surroundings, and that the same organic part may be moulded into various implements serving totally different ends by the environmental vicissitudes of time and space. On the hypothesis that the members of each group of animals possessing common characteristics, whether the group be large or small, have sprung from a common ancestry, and that the differences in structure have arisen as a result of differences in environment, the similarities and homologies of structure existing among animals are perfectly intelligible. But on any other supposition they are inexplicable.

3. Evolution is suggested by the remarkable series of phenomena presented by embryology. There are at least four facts in the developmental history of every creature which can hardly be accounted for on any other supposition than that of organic evolution.

First, the fact that every animal, above the lowest, individually passes through an evolution between the beginning of its existence and its maturity. Terrestrial beings are not born, like Minerva, full-grown. They grow. They evolve. They commence close down to the very atoms. And from this lowly genesis they rise, through a series of marvellous changes, to that high state of perfection and greatness from which they descend to dissolution.

If we knew by actual observation as little concerning the evolution of individuals as we do of the evolution of species—if we had always been used to seeing animals, including ourselves, in full bloom—had never watched the tadpole, the pupa, and the babe pass through their wonderful metamorphoses on their way to maturity, it would probably be just as hard for many minds to believe that animals evolve individually to be what they are as it is for them to believe that species have grown to be what they are. In the case of individuals, however, the evolution takes place right before our eyes largely, while the evolution of species goes on so slowly and stretches back so far into the past that it can only be inferred.

Second, the fact that animals, no matter how much they may differ from each other at maturity, all begin existence at the same place. Every animal commences its organic existence as an egg—as a one-celled animal—as an organism identical in structure with the simplest protozoan. The ova of whales ‘are no larger than fern seeds.’ The eggs of the coral, the crab, the ape, and the man are so precisely alike that the highest powers of the microscope cannot distinguish between them.

Third, the fact that the members of the same great group of animals in their individual development pass through similar stages of evolution. The ‘worm’ stage in the development of most insects and the ‘fish’ stage of frogs are well known.

There are no more remarkable instances of individual evolution in the whole range of animal life. The fish, the reptile, the bird, the dog, and the human being—all vertebrates, in short—cannot for some time after their embryonic commencement be distinguished from each other. ‘The feet of lizards and mammals, the wings and feet of birds, and the hands and feet of men,’ says the illustrious Von Baer, as quoted by Darwin, ‘all arise from the same fundamental form’.^[1a]

‘It is quite in the later stages of development,’ says Huxley, ‘that the human being presents marked differences from the ape, while the latter departs as much from the dog in its development as the man does’.^[2]

Not only frogs, but reptiles, birds, and mammals, including man, all have gills at a certain stage in their embryonic development. Nearly all the lower invertebrate animals are hermaphroditic—that is, in the body of each animal is found the two kinds of sex organs which in the higher animals exist in distinct animals. And frogs, birds, and other higher animals, which as adults are unisexual, have, as an inheritance from these primitive forms, hermaphroditic embryos.^[3a]

Fourth, the fact that the structural stages through which animals in embryo pass correspond in a wonderful manner with the permanent structures of those lower forms which extend serially back to the beginnings of life. It is the proudest boast of the embryologist that he is able to know the route through which any species has come to be what it is by a simple study of the individual evolution of its members. Each animal repeats in its individual evolution the evolution of its species. This recapitulation is not always complete—is, in fact, frequently vague, sometimes circuitous, and often broken or abbreviated. Processes requiring originally centuries or thousands of years to accomplish are here telescoped into a few months, or even days. It is not strange that the process is imperfect. But so firmly is the belief in the correspondence of ontogeny and phylogeny fixed in the minds of modern biologists that, in determining the classification and affinities of any particular animal, more reliance is placed on the facts of embryology than on those of adult structure.

The first thing that an animal becomes after it is an egg—unless it is a one-celled animal, in which case it remains always an egg—is two cells; these two cells become four; these four become eight; and so on, until the embryo becomes a many-celled ball, consisting of a single layer of cells surrounding a fluid interior. A dimple forms in the cell layer on one side of this ball, and, by deepening to a hollow, changes the ball into a double-walled sac. This is the gastrula—the permanent structure of the sponges and celenterates, and an (almost) invariable stage in the larval development of all animals above the sponges and celenterates. The gastrula becomes a worm (or an insect or a fish through the worm) by elongation and enlargement, and by the development of the endoderm, which is the inner layer of the cell wall, into organs of nutrition and reproduction, and by the development of the ectoderm, which is the outer cell layer, into organs of motion and sensation.

The embryonic development of a human being is not different in kind from the embryonic development of any other animal. Every human being at the beginning of his organic existence is a protozoan, about ¹⁄₁₂₅ inch in diameter; at another stage of development he is a tiny sac-shaped mass of cells without blood or nerves, the gastrula; at another stage he is a worm, with a pulsating tube instead of a heart, and without head, neck, spinal column, or limbs; at another stage he has, as a backbone, a rod of cartilage extending along the back, and a faint nerve cord, as in amphioxus, the lowest of the vertebrates; at another stage he is a fish with a two-chambered heart, mesonephric kidneys, and gill-slits with gill arteries leading to them, just as in fishes; at another stage he is a reptile with a three-chambered heart, and voiding his excreta through a cloaca like other reptiles; and finally, when he enters upon post-natal sins and actualities, he is a sprawling, squalling, unreasoning quadruped. The human larva from the fifth to the seventh month of development is covered with a thick growth of hair and has a true caudal appendage, like the monkey. At this stage the embryo has in all thirty-eight vertebrae, nine of which are caudal, and the great toe extends at right angles to the other toes, and is not longer than the other toes, but shorter, as in the ape.

These facts are unmistakable. There is a reason for everything, and there is a reason for these transformations through which each generation of living beings journeys. The individual passes through them because the species to which he belongs has passed through them. They represent ancestral wanderings. As if to emphasise the kinship of all of life’s forms and to render incontrovertible the fact of universal evolution, Nature compels every individual to commence existence at the same place, and to recapitulate in his individual evolution the phylogenetic journeyings of his species.

4. That existing forms of life have been evolved from other forms, and that these ancestral forms have been different from those derived from them, is shown by the occasional appearance of antecedent and abandoned types of structure among the offspring of existing species. Occasionally a human child is born strangely unlike its parents, but bearing an unmistakable resemblance in looks and disposition to his great-grandfather or some other remote ancestor. This is atavism, that tendency to revert to ancestral types which is prevalent among all animals. We may think of it figuratively as a flash of indecision when Nature hesitates for a moment whether to adopt a new form of structure or cling to the old and tried. Horses and mules are sometimes born with three toes on each foot, and zebra-like stripes on their legs and shoulders; and domestic pigeons, such as are naturally black, red, or mottled, occasionally produce offspring with blue plumage and two black wing-bars, like the wild rock-dove, from which all domestic breeds have sprung. In man the cheekbone and the frontal bone of the forehead consist normally each of a single bone. But in children and human embryos these bones are always double, as is normally the case in adults among some of the anthropoids and other mammals. Gills appear regularly in the embryos of reptiles, birds, and mammals, and human young are sometimes born with gill-slits on the neck. There are times when, owing to inaccurate or incomplete embryological development, these fish-like characteristics are so perfect at birth as to allow liquids, on being swallowed, to pass out through them and trickle down on the outside of the neck. Many muscles are occasionally developed in man which are normal in the apes and other mammals. As many as seven different muscular variations have been found in a single human being, every one of which were muscles found normally in the structure of the apes.^[1b]

5. Closely akin to atavism, which is the occasional persistence of ancestral types of character, is the regular occurrence of vestigial organs or structures, organs which in ancestral forms have definite functions, but which in existing species, owing to changed conditions, are rudimentary and useless. On the back of each ankle of the horse are two splints, the atrophied remains of the second and fourth toes. Similar vestiges of two obsolete toes are also found just back of the wrists and ankles on all the two-toed ungulates, such as the cow and sheep. In the body of the whale where hind-limbs would naturally be, there are found the anatomical ruins of these organs in the form of a few diminutive bones. The same thing is true in the sirenians. In the Greenland whale there are remnants of both femur and tibia in the region of the atrophied hind-limbs. The snakes are limbless, but the pythons and boas have internal remnants of hind-limbs and sometimes even clawed structures representing toes. The so-called ‘glass-snake’ or ‘joint-snake’ (which is really a limbless lizard) has four complete internal limbs. Young turtles, parrots, and whalebone whales have teeth, but the adults of these animals are toothless. Cows, sheep, deer, and other ruminants, never have as adults any upper incisors, but these teeth are found in the foetal stages of these animals just under the gums. The female frog has rudimentary male reproductive organs, and the male has corresponding vestiges of female organs. Similar remnants of the reproductive structures exist in many other animals. They represent stages in the transition from the hermaphroditism of primitive animals to the unisexuality of the higher forms, the separation of the sex organs into those of male and female having come about through the decay of one set of structures in each individual.

For reasons which it is not necessary to mention here, biologists believe that insects all originated from a common parental form, with two pairs of wings and six legs. Insects all retain their original allowance of legs, but in many species one or the other pair of wings has become more or less degenerated. In the whole order of flies the back pair of wings is represented by a couple of insignificant knobs. In the Strepsiptera, a sub-order of beetles, the front-wings are similarly reduced, being mere twisted filaments. Many parasites, such as fleas and ticks, whose mode of life renders organs of aerial locomotion unnecessary, are entirely wingless. The insects of small isolated islands are also largely without wings, the proportion of wingless species being much larger than among insects inhabiting continents. This is due to their greater liability on small land masses of being carried out to sea and drowned, owing to the feebleness and uncertainty of insect flight. On the island of Madeira, out of the 550 species found there, 220 species no longer have the power of flight.

Air-breathing animals—amphibians, reptiles, birds, and mammals—have normally a pair of lungs—a right one and a left one. But in snakes and snake-like lizards, where the body is very slender and elongated, only one lung, sometimes the right one, and sometimes the left, is fully developed. The right ovary is likewise aborted in all birds, the left one yielding all the eggs. The swifts and frigate birds live almost their whole lives long on the wing, and the legs of these birds have grown so short and weak and rudimentary, as a result of their constant life in the air, that they can scarcely walk. The chimney swift is said never to alight anywhere except on the sooty inner walls of the chimney where its nest is. Its food consists of insects which it gathers in the air, and the few dead twigs used in making its nest are nipped from the tree while the bird continues its flight. The ostriches, cassowaries, and many other birds, have, on the other hand, developed their legs at the expense of their wings. The ostrich is said to be able to outrun the horse, but it has no power of flight, although it has wings and wing muscles, and even the skin-folds covering the wings corresponding to those of birds that fly. But its whole flying apparatus is in ruins. The rudimentary hind-toe of birds is a vestigial organ, and so are the claws which appear on the thumb and first finger of all young birds. So also are the rudiments of eyes in cave crickets, fishes, and other inhabitants of total darkness. The flounder and other so-called flat fishes swim straight up, as ordinary fishes do, when young. But as they grow they incline more and more to one side, and finally swim entirely on their side, the eye on the lower side migrating around, and joining the other on the upper side of the head.

About the first thing a human infant does on coming into the world is to prove its arboreal origin by grasping and spitefully clinging to everything that stimulates its palms. A little peeperless babe an hour old can perform feats of strength with its hands and arms that many men and women cannot equal. It can support the entire weight of its body for several seconds hanging by its hands. Dr. Robinson, an English physician, found as a result of sixty experiments on as many infants, more than half of whom were less than an hour old, that with two exceptions every babe was able to hang to the finger or to a small stick, and sustain the whole weight of the body for at least ten seconds. Twelve of those just born held on for nearly a minute. At the age of two or three weeks, when this power is greatest, several succeeded in sustaining themselves for over a minute and a half, two for over two minutes, and one for two minutes and thirty-five seconds. The young ape for some weeks after birth clings tenaciously to its mother’s neck and hair, and the instinct of the child to cling to objects is probably a survival of the instinct of the young ape. I believe it is Wallace who relates somewhere an incident which illustrates the instinct of the young simian to cling to something. Wallace had captured a young ape, and was carrying it to camp, when the little fellow happened to get its hands on the naturalist’s whiskers, which it mistook, evidently, for the hirsute property of its mother, and, driven by the powerful instinct of self-preservation, it hung on to them so desperately it could scarcely be pulled loose. Many mammals are provided with a well-developed muscular apparatus for the manipulation of their ears. But in man there does not exist the same necessity for auricular detection of enemies, and while these muscles still exist, and are capable of being used to a slight extent by occasional individuals, they are generally so emaciated as to be useless.

Another vestigial organ in the body of man, and one of significance from the standpoint of morphology, is the tail. The tail is an exceedingly unpopular part of the human anatomy, most men and women being unwilling to admit that they have such an appendage. But many a person who has hitherto dozed in ignorance on this matter has learned with considerable dismay, when he has for the first time looked upon the undraped lineaments of the human skeleton, that man actually has a tail. It consists of three or four (sometimes five) small vertebrae, more or less fused, at the posterior end of the spinal column. That this is really a rudimentary tail is proved beyond a doubt by the fact that in the embryo it is highly developed, being longer than the limbs, and is provided with a regular muscular apparatus for wagging it. These caudal muscles are generally represented in grown-up people by bands of fibrous tissue, but cases are known where the actual muscles have persisted through life.^[4]

The nictitating membrane, which in birds and many reptiles consists of a half-transparent curtain acting as a lid to sweep the eye, is in the human eye dwindled to a small membranous remnant, draped at the inner corner. The growth of hair over the human body surface may be regarded, in view of the sartorial habits of man, as a vestigial inheritance from hairy ancestors. One of the most notorious of the vestigial organs of man is the vermiform appendix, a small slender sac opening from the large intestine near where the large intestine is joined by the small intestine. In some animals this organ is large and performs an important part in the process of digestion. But in man it is a mere rudiment, not only of no possible aid in digestion, but the source of frequent disease, and even of death.

There are in all, according to Darwin, about eighty vestigial organs in the human body. But these organs occur everywhere throughout the animal kingdom. There is not an order of animals, nor of plants either, without them. They are necessary facts growing out of evolution. Organic structures are the result of adjustment to surrounding conditions. The continual changes in environment to which all organisms are exposed necessitate corresponding changes in structure. And the vestiges found in the bodies of all animals represent parts which in the previous existence were useful and necessary to a complete adjustment of the organism, but which, owing to a change of emphasis in surroundings, have become useless, and consequently shrunken. They are the obsolete or obsolescent parts of animal structure—parts which have been outgrown and superseded—the ‘silent letters’ of morphology. They sustain the same relation to the individual organism as dead or dwindling species sustain to a fauna. They furnish indisputable proof of the kinship and unity of the animal world.

6. It is only on the supposition that the life of the earth has evolved step by step with the evolution of the land masses, and that the forms of life from which existing forms were evolved were dispersed over the earth at a time when physiographic conditions were very different from what they are now, that it is possible to account for the peculiar manner in which animals are distributed over the earth. The cassowary is a flightless bird of the ostrich order inhabiting Australia and the islands to the north of it. This bird is found nowhere else in the world, and each area has its own particular species. The same things are also true of the kangaroo. It is found over a similar region, with a different species occupying each land mass. Now, on the hypothesis of special creation there is no thinkable reason why these animals should be divided, as they are, into distinct species, and restricted to this particular region. But on the hypothesis of evolution it is perfectly plain. All of these regions at one time were united with one another, and were subsequently submerged in part, forming islands. Each group of animals, being isolated from every other group and subjected to somewhat different conditions, developed a style of departure from the original type of structure different from that of every other group in response to the peculiar conditions operating upon it. This has led, in the course of centuries of selection, to the formation of distinct species such as exist to-day.

Lombock Strait, a narrow neck of water between Bali and Lombock Island, and Macassar Strait, separating Celebes from Borneo, are parts of a continuous passage of water which in remote times separated two continents—an Indo-Malayan continent to which belonged Borneo, Sumatra, Java, and the Malay Peninsula; and an Austro-Malayan continent, now represented by Australia, Celebes, the Moluccas, New Guinea, Solomon’s Islands, etc. Wallace first announced this ancient boundary, and it has been called ‘Wallace’s line.’ He was led to infer its existence by the fact which he observed as he travelled about from island to island, that, while the faunas of these two regions are as wholes very different from each other, the faunas of the various land patches in each area have a wonderful similarity. Australia is a veritable museum of old and obsolete forms of both plants and animals. Its fauna and flora are made up prevailingly of forms such as have on the other continents long been superseded by more specialised species. No true mammals, excepting men and a few rats, lived in Australia when Englishmen first went there. The most powerful animals were the comparatively helpless marsupials. The explanation of these remarkable facts is probably this: The Australian continent, which formerly included New Guinea and other islands to the north, has not been connected with the other land masses for a very long period of time. The development upon the other continents of the more powerful mammals, especially of the ungulates and the carnivora, resulted in the extermination of the more helpless forms from most of the earth’s surface. But Australia, protected by its isolation, has retained to this day its old-fashioned forms of life, neither land animals nor plants having been able to navigate the intervening straits. This supposition is strengthened by the fact that fossil remains of marsupials are to-day found scattered all over the world, while, with the exception of the American opossums, living marsupials are found only in Australia and its islands. There is to-day not a single survivor of these once-numerous races in either Europe, Asia, or Africa. Similar facts of distribution are furnished by the lemurs—those small, monkey-like animals with fox faces, which are sometimes called ‘half-apes,’ since they are supposed to be the link connecting the true apes with lower forms. Fossil lemurs are found in both America and Europe, but lemurs are now extinct in both continents. Those of America were probably exterminated by the carnivora, who are known to be very fond of monkey meat of all kinds. The European lemurs seem to have migrated southward into eastern Africa at a time when Madagascar formed a part of the mainland. ‘There they have been isolated, and have developed in a fashion comparable to that which has occurred in the case of the Australian marsupials. Of fifty living species, thirty are confined to Madagascar, and the lemurs are there exceedingly numerous in individuals. Outside of Madagascar they only maintain a precarious footing in forests or on islands, and are usually few in number’.^[3b]

If the earth were peopled by migrations from Ararat, it would require a good deal of intellectual legerdemain to show why the sloths are confined to South America and the monotremes to Australia and its islands. The reindeer of northern Europe and Asia, and the elk and caribou of Arctic America, are so much alike they must have descended from a common ancestry, and been developed into distinct species since the separation of North America and Eurasia. The same thing is probably also true of the puma and jaguar, who inhabit the middle latitudes of the New World, and the lion, tiger, and leopard, occupying like latitudes of the Old World. They all belong to the cat family, and represent divergences from a common feline type of structure. The camel does not exist normally outside of northern Africa and central and western Asia. And when the camel-like llama of South America first became known to zoologists, it was a problem how this creature could have become separated so far from the apparent origin of the camel family. But since then fossil camels have been found all over both North and South America. And it has even been suspected that perhaps America was the original home of the camel, and that, like the horse, the camel migrated to the eastern hemisphere at a time when the eastern and western land masses were connected. The foxes, hares, and other mammals of the upper Alps, also many Alpine plants, are like those of the Arctic regions. The most probable explanation of these resemblances is that these Alpine species climbed up into these inhospitable altitudes, and were left stranded here on this island of cold, when their relatives, on the return of warmth at the close of the glacial period, retreated back to the ice-bound fastnesses around the pole. It is for a similar reason, probably, that the flora of the upper White Mountains resembles that of Labrador.

7. One of the strongest pieces of evidence bearing on evolution that is furnished by any department of knowledge is that furnished by geology. It is the evidence of the rocks. Geology is, among other things, a history of the earth. This history has been written by the earth itself on laminae of stone. It is from these records that we learn incontestably the order in which the forms of life have made their appearance on the earth.

Three-fourths of the surface of the earth is sea. Over the surface of the remaining fourth, excepting in mountainous places, is a layer of soil, varying from a few feet to a few hundred feet in depth. Beneath this coverlet of soil, extending as far as man has penetrated into the earth, is rock. Excepting in regions overflowed by lava poured out from beneath, or along the backbones of continents where the surface rocks have been upheaved into folds and carried away by denudation, the rocks immediately beneath the soil, to a thickness often of thousands of feet, are in the form of layers, or sheets, arranged one above another. These rocks are called sedimentary rocks, as distinguished from the unlaminated rocks of the interior. They have been formed at the bottom of the sea, and have, hence, all been formed since the condensation of the oceans. They have been formed out of the detritus of continents brought down by the rivers and the accumulated remains of animal and vegetal forms which have slowly settled down through the waters. They are the successive cemeteries of the dead past. Such rocks are now forming over the floors of all oceans—forming just as they have formed throughout the long eons of geological history. Along the axes of ancient mountains and in deep-cut canyons the rock layers are exposed to a thickness of thousands of feet, in some cases thirty or forty thousand feet. Here they lie, piled up, one on top of another, the great, broad pages upon which are written the long, dark story of our planet. It is the mightiest and most everlasting of all annals—the autobiography of a world. It is possible, by studying these rock records, to know not only the kind of life that lived in each age, but a good deal regarding the conditions in which that life lived and passed away. Just as the naturalist is able, from a single bone of an unknown animal, to reconstruct the entire animal and to infer something of its surroundings and habits of life, and as the archeologist, by going back to the graves of deceased races and digging up the dust upon which these races wrought, is able to tell much of their history and characteristics, so the geologist, by studying the bones of those more distant civilisations, the civilisations sandwiched among the fossiliferous rocks, is able to know, not only just the kind of life that lived in each age, but, by comparing the species of successive strata, can construct with astonishing fulness the genealogical outline of the entire life process. The succession of life forms as they appear in the rocks, with a sketch of their probable genealogy, is traced elsewhere in this chapter. It is only necessary to say here that the order in which the forms of life appear in the sedimentary strata is that of a gradually increasing complexity. The invertebrates appear first; then the fishes, the lowest of the vertebrates; after these come the amphibians; following these the reptiles; and finally the birds and mammals.

8. There is another reason for a belief in evolution furnished by geology, but of a somewhat different kind from that just stated. It consists in the fact that there are found in the rocks series or grades of structures, which fit with amazing accuracy on to the structures of existing species. Now, this is precisely what, according to the evolutional hypothesis, is to be expected. For, if evolution is true, existing species represent the tops of things. They are the existing and visible parts of processes which extend indefinitely back into the past, and whose deceased stages may reasonably be expected to be found fossil in the earth. Considering the youth and inexperience of paleontology and the torn and incoherent character of the record, it is surprising that anatomists have been able to accomplish what they have accomplished. In many cases—notably, those of man, the snail, the crocodile, and the horse—antecedent forms of structure have been found in almost unbroken gradations leading back to types differing immensely from their existing representatives. Bones and fossils of men have been found buried beneath the alluvium of rivers, under old lava-beds, and in caves, crusted over by the deposits of percolating waters. Many such fossils are found in quaternary rocks, along with the bones of animals still living and some extinct. Some of these remains indicate unmistakable affinities with the ape. The most celebrated of these discoveries is the fossil of an erect ape-man (Pithecanthropus erectus), found by a Dutch Governor on the island of Java in 1894. This fossil, in the shape and size of the head and in its general structure, strikes about as near as could be the middle between man and ape. That it is the fossil of an ambiguous form is indicated by the fact that, when it was examined by a company of twelve specialists at Berlin soon after its discovery, three of them declared it to be the remains of an individual belonging to a low variety of man; three others thought it was a large anthropoid; while the other six held that it was neither man nor anthropoid, but a genuine connecting link between them. It is discussed at length by Haeckel in ‘The Last Link,’ a paper read before the International Congress of Zoology, at Cambridge, in 1898. ‘It is,’ says the veteran biologist, ‘the much-sought “missing link” supposed to be wanting in the chain of primates which stretches unbroken from the lowest catarhine to the most highly developed man.’ Associated with this fossil ape-man were the fossils of the elephant, hyena, and hippopotamus, none of which any longer exist in that part of the world, also the fossil remains of two orders of animals now extinct. The genealogy of the crocodile has been traced by Huxley, through all intermediate stages, back to the giant reptiles of the early Tertiary.^[5]And the pedigree of the horse has been even more completely worked out by the indefatigable Marsh. In the museum of Yale University may be seen the fossil history of this splendid ungulate, from the time it was a clumsy little quadruped only 14 inches high, and with four or five toes on each foot, down to existing horses. The earliest known ancestor of the horse, the eohippus, lived at the beginning of the Eocene epoch. It had five toes, almost equal, on each front foot (four toes behind), and was about the size of a fox. The orohippus, which lived a little later, had four toes on each front-foot, and three behind. The mesohippus, found in the Miocene, had three toes and one rudimentary toe on each front-foot, and three toes behind. It was about the size of a sheep. The miohippus, which is found later, had three toes on each of its four feet, with the middle toe on each foot larger than the other two. The pliohippus, living in the Pliocene epoch, had one principal toe on each foot, and two secondary toes, the two secondary toes not reaching to the ground. It was about the size of a donkey. Existing horses have one toe on each foot—the digit corresponding to the big middle finger—and the ruins of two others in the form of splints on the back of each ankle. In the embryo of the horse these splints are segmented, each of them, into three phalanges. Fossil remains representing all stages in the development of the horse have been found in the regions about the upper waters of the Missouri River.

It is an important fact that the types of structure forming any series grow more and more generalised as the distance from the present increases, and that different lines of development, when traced back into the past, often converge in types which combine the main characters of various existing groups. The horses, rhinoceroses, and tapirs, great as are the differences among them now, can be traced back step by step through fossil forms, their differences gradually becoming less marked, until ‘the lines ultimately blend together, if not in one common ancestor, at all events into forms so closely alike in all essentials that no reasonable doubt can be held as to their common origin.’ ‘The four chief orders of the higher mammals—the primates, ungulates, carnivora, and rodents—seem to be separated by profound gulfs, when we confine our attention to the representatives of to-day. But these gulfs are completely closed, and the sharp distinctions of the four orders are entirely lost, when we go back and compare their extinct predecessors of the Cenozoic period, who lived at least three million years ago. There we find the great sub-class of the placentals, which to-day comprises more than two thousand five hundred species, represented by only a small number of insignificant pro-placentals, in which the characters of the four divergent orders are so intermingled and toned down that we cannot in reason do other than consider them as the precursors of those features. The oldest primates, the oldest ungulates, the oldest carnivora, and the oldest rodents, all have the same skeletal structure and the same typical dentition (forty-four teeth) as these pro-placentals; all are characterised by the small and imperfect structure of the brain, especially of the cortex, its chief part, and all have short legs and five-toed, flat-soled (plantigrade) feet. In many cases among these oldest placentals it was at first very difficult to say whether they should be classed with the primates, ungulates, carnivora, or rodents, so very closely and confusedly do these four groups, which diverge so widely afterwards, approach each other at that time. Their common origin from a single ancestral group follows incontestably’.^[6]

9. Man is the most powerful and influential of animals. He rules the world—rules it with a sovereignty more despotic and extensive than that hitherto exercised by any other animal. Many races of beings are, and have been for centuries, completely dominated by him. These races, during their long subjection, have been changed and transformed by man in a wonderful manner through his control of their power to breed. All domestic animals have come from wild animals; they have been derived by a process of selective evolution conducted by man himself. By continually choosing as the progenitors of each generation those with qualities best suited to his whims and purposes, man has evolved races as different from each other in appearance and structure, and as different from the original species, as many groups which, in the wild state, constitute distinct species; indeed, man has in some cases created entirely new species, both of plants and animals—species that breed true and are what biologists call ‘good’—by his own selections.

There are something over 150 different varieties of the domestic pigeon. Some of these varieties—as many as a dozen, Mr. Darwin thinks—differ from each other sufficiently to be reckoned, if they are considered solely with reference to their structures, as entirely distinct species. The carrier, for instance, the giant of the pigeons, measures 17 inches from bill-tip to the end of its tail, and has a beak 1 ³⁄₄ inches long. Around each eye is a large dahlia-like wattle, and another large wattle is on the beak, giving the beak the appearance of having been thrust through the kernel of a walnut. The tumbler is small, squatty, and almost beakless. It has the preposterous habit of rising high in the air and then tumbling heels over head. The roller, one of the many varieties of the tumbler, descends to the ground in a series of back somersaults, executed so rapidly that it looks like a falling ball. The runt is large, weighing sometimes as much as the carrier. The fantail has thirty or forty feathers in its tail, while all other varieties have only twelve or fourteen, the normal number for birds. The trumpeter, so named on account of its peculiar coo, has an umbrella-like hood of feathers covering its head and face, and its feet are so heavily feathered that they look like little wings. In the correct specimens of this variety the feathers have to be clipped from the face before the birds can see to feed themselves. The pouter has the absurd habit of inflating its gullet to a prodigious size, and the Jacobin wears a gigantic ruff. The homing pigeon has such a strong attachment for its cote that it will travel hundreds of miles, sometimes as many as 1,400 miles, in order to reach the home from which it has been separated. But it is not simply in their colour, size, habits, and plumage, that pigeons vary. There are corresponding differences in their structures, in the number of their ribs and vertebrae, in the shape and size of the skull, in the bones of the face, in the development of the breast-bone, and in the length of the neck, legs, and bill. Pigeons also differ in the shape and size of their eggs, and in their dispositions and voice. ‘There is,’ says Huxley in summing up his discussion of the great variety in these birds, ‘hardly a particular of either internal economy or external shape which has not by selective breeding been perpetuated and become the foundation of a new race’.^[7]

All of the 150 different varieties of domestic pigeons have been evolved by human selection during the past three or four thousand years from the blue rock-doves which to-day inhabit the seacoast countries of Europe.

What is true of pigeons is also true largely of most of the other races associated with man—of cats, cattle, horses, sheep, swine, goats, fowls, and the like. All varieties of the domestic chicken—the clumsy Cochin with its feather-duster legs, the tall and stately Spanish, the great-crested Minorca, the Dorking with its matchless; comb and wattle, the almost combless Polish, the blue Andalusian, the gigantic Brahma, the tiny Bantam, the Wyandottes in all colours (black, white, buff, silver, and golden), the magnificent Plymouth Rocks, and the exceedingly pugnacious Game-cock—these and dozens of other varieties, all flightless, have come from the jungle-bird whose morning clarion still greets Aurora from the wilds of distant India. The dog is a civilised wolf, and the wild-boar is the progenitor of the oleaginous swine. The Merino and South Down breeds of sheep have come from the same stock in the last century and a half. In 1790 a lamb was born on the farm of Seth Wright in Massachusetts. It had a long body and short, bowed legs. It was noticed that this lamb could not follow the others over the fences. The owner thought it would be a good thing if all his sheep were like it. So he selected it to breed from. Some of its offspring were like it, and some were like the ordinary sheep. By continual selection of those with long bodies and short legs the ancon breed of sheep was finally produced. In 1770 in a herd of Paraguay cattle a hornless male calf appeared, and from this individual in a similar way came the stock of Muleys. The occasional appearance of horned calves and lambs among the offspring of hornless breeds of cattle and sheep are examples of atavism indicating the presence of a vestigial tendency to breed true to their horned ancestors. The Hereford cattle originated as a distinct variety about 1769 through the careful selections of a certain Englishman by the name of Tompkins. All domesticated quadrupeds, except the elephant, have come from wild species with erect ears, the ears acting as funnels to harvest the sound-waves. But there are few of them in which there is not one or more varieties with drooping ears—cats in China, horses in parts of Russia, sheep in Italy, cattle in India, and pigs, dogs, and rabbits in all long-civilised lands. We are so accustomed to seeing dogs and pigs with pendent ears that we are surprised to know there are varieties with erect ears. The goldfish is a carp, and in its native haunts in the waters of China it has the colour of the carp. The golden hue seen in the occupants of our aquaria has been given to this fish by the Chinese through the continual selection of certain kinds. The goldfish, almost as much as the pigeon, has been the sport of fanciers, and the strangest varieties have resulted. Some have outlandishly long fins, while others have no dorsal fin at all. Some are streaked and splotched with gold and scarlet; others are pure albinos. One of the most monstrous varieties has a three-lobed tail-fin, and its eyeballs, without sockets, are on the outside of its head. All of our common barnyard fowls—turkeys, ducks, geese, and chickens—are flightless, but the varieties from which the domesticated forms have come all have functional wings, two of these varieties crossing continents in their annual migrations.

Not only animals, but plants also, many of them, have been greatly changed by man in his efforts to adapt them to his uses as food, ornamentation, and the like. On the seaside cliffs of Chili and Peru may still be found growing the wild-potato—the small, tough, bitter ancestor of the mammoth Burbank, Peerless, Early Rose, and the nearly two hundred other varieties of this matchless tuber found in the gardens of civilised man. The cabbage, kale, cauliflower, and kohlrabi are all modifications of the same wild species (Brassica oleracea), the cauliflower being the developed flower, kohlrabi the stalk, and kale and cabbage the leaves. The peach and the almond, Darwin thinks, have also come from a common ancestral drupe, the peach being the developed fruit, and the almond the seed. There are nearly 900 different varieties of apples, varying in the most wonderful manner in size, colour, flavour, texture, and shape, but all of them probably derived from the little, sour, inedible Asiatic crab. The many times ‘double’ roses of our gardens have come from the five-petalled wild-rose of the prairies. The cultivated varieties of viburnum and hydrangea have showy corymbs of infertile flowers only, but the wild forms from which the domestic varieties have been derived have only a single marginal row of showy infertile flowers surrounding a mass of inconspicuous fertile flowers. It has been due to their efforts to please men that bananas, pineapples, and oranges have got into the habit of neglecting to produce seeds. There are certain species of grapes that are seedless, also seedless sugar-cane, and a seedless apple has just been announced by horticulturists. The development of domesticated plants is only in its infancy, and it is probably impossible even for the most agile imagination to dream of the miracles the horticulturist is destined to work in the ages to come. There is every reason to believe that seedless varieties of all our common fruits will ultimately be produced, and that in size, flavour, nutrient constituents, and appearance, they will be developed into forms utterly different from existing varieties. Just within the last few years the U.S. Department of Agriculture has developed a cotton-plant immune to the bacterial diseases of the soil, which had completely driven the cotton-raising industry out of large districts of the South. The cultivation of many of the cereals has gone on so long, and has proceeded so far, that their origin is lost in antiquity.

Whether or not it is possible for new varieties and species to be evolved is a question, therefore, which does not need to depend for reply wholly upon theory. It is known to have taken place; and the process by which the different varieties of domestic animals and plants have been evolved—domestic selection—is not different in principle from the process of natural selection, the chief operation by which life in general, both plant and animal, is assumed to have been evolved.

10. There are other reasons for a belief in organic evolution, but the last one I shall mention is the fact that the theory of organic evolution harmonises with the known tendencies of the universe as a whole. The organic kingdoms of the earth—animals and plants—are as truly parts of the terrestrial globe as the inorganic kingdom is; and as such they share in, and are actuated by, the same great tendency or instinct as that which actuates the whole. Nine-tenths of the substance of all animals and plants is oxygen, hydrogen, carbon, and nitrogen—the very elements which make up the entire ocean and air, and enter largely into the composition of the continents. The human body, which has essentially the same chemical composition as the bodies of animals in general, is made up of four solids, five gases, and seven metals—in all, sixteen elements of the something like seventy which constitute the entire planet. ‘In the past, man appeared to be a creature foreign to the earth, and placed upon it as a transitory inhabitant by some incomprehensible power. The more perfect insight of the present day sees man as a being whose development has taken place in accordance with the same laws as those that have governed the development of the earth and its entire organisation—a being not put upon the earth accidentally by an arbitrary act, but produced in harmony with the earth’s nature, and belonging to it as do the flowers and the fruits to the tree which bears them.’ Animals are not outside of, nor distinct from, the universe, as one might suspect who has listened much to the recital of tradition so long accepted as science. They are more or less detached portions of the planet earth which move over its surfaces and through its fluids and multiply, but which in their phenomena obey the same laws of chemistry and physics as those in accordance with which the rest of the universe acts. Animals are moulds through which digressing matters from the soil, sea, and sky pass on rounds of eternal itineracy.

Now, the earth as a planet is in process of evolution. Not many things are more certain than this. The earth has come out of fire. It has grown to be what it is. Its mountains, valleys, plains, seas, shores, islands, lakes, rivers, and continents—these were not always here. They have been evolved. Not only the earth, but the entire family of spheres of which the earth is a member—the solar system—are all evolving. Mr. Spencer never did anything more profound than when he demonstrated in his ‘Law and Cause of Progress’ the universal migration of things from a condition of homogeneity toward a condition of greater and greater heterogeneity. The whole universe, or as much of it as can be examined by terrestrial instruments, has probably evolved out of the same primordial matters. The organic part of the earth has evolved, therefore, and is destined to continue to evolve, because it is a part of a whole whose habit or ambition it is to evolve.

The evidence is overwhelming. The theory of organic evolution is sustained by a mass of facts not less authoritative and convincing than that which supports the Copernican theory of the worlds. Evolution is, in fact, a doctrine so apparent that it only needs to be honestly and intelligently looked into to be accepted unreservedly. It is, indeed, more than a doctrine. It is a known fact. It is a necessary effect of the conditions known to exist among the animals and plants of the earth. If beings vary among themselves generation after generation, if only the fittest of each generation survive and if the survivors tend to transmit to their offspring the qualities of their superiority (and the animals and plants of the earth are known to do continually all of these things), then it follows with mathematical certainty that evolution is going on, and that it will continue to go on as long as these conditions continue. It is inevitable. It could not be otherwise. We would know that evolution were going on among organisms where these conditions existed, even though we had never observed it.

The boldest and most enthusiastic opponents of evolution have always been those with the least information about it. But the evidence is accumulating so rapidly, and is being drawn up in such unanswerable array, that, if it is not already the case, it will not be many years before it will be an intellectual reproach for anyone to discredit, or to be known to have discredited, this splendid and inspiring revelation.

[1a.] [1b.] Darwin: Descent of Man, 2nd edit.; London, 1874.
[2.] Huxley: Man’s Place in Nature; New York, 1883.
[3a.] [3b.] Thompson: Outlines of Zoology, 3rd edit.; Edinburgh, 1899.
[4.] Drummond: Ascent of Man; New York, 1894.
[5.] See table of geological ages, at the end of the chapter.
[6.] Haeckel: The Riddle of the Universe; New York, 1901.
[7.] Huxley: On the Origin of Species, lecture iv.

X. The Genealogy of Animals.

Life originated in the sea, and for an immense period of time after it commenced it was confined to the place of its origin. The civilisations of the earth were for many millions of years exclusively aquatic. It has, indeed, been estimated that the time required by the life process in getting out of the water—that is, that the time consumed in elaborating the first species of land animals—was much longer than the time which has elapsed since then. I presume that during a large part of this early period it would have seemed to one living at that time extremely doubtful whether there would ever be on the earth any other kinds of life than the aquatic. And if those who to-day weave the fashionable fabrics of human philosophy, and who know nothing about anything outside the thin edge of the present, had been back there, they would no doubt have declared confidently, as they looked upon the naked continents and the uninhabited air and the sea teeming with its peculiar faunas, that life upon solids or in gases, life anywhere, in fact, except in the sea, where it had always existed, and to which alone it was adapted, was absolutely, and would be forever, impossible; and that feathered fishes and fishes with the power to run and skip, and especially ‘sharks’ competent to walk on one end and jabber with the other, were unthinkable nonsense. Life originated in the sea for the same reason that the first of the series of so-called ‘civilisations’ which have appeared in human history sprang from the alluvium of the Euphrates and the Nile, because the conditions for bringing life into existence were here the most favourable. The atmosphere was incompetent to perform such a task as the inventing of protoplasm and there was no land above the oceans.

The first forms of life were one-celled—simple, jelly-like dots of almost homogeneous plasm—the protozoa. These primitive organisms were the common grandparents of all beings. From them evolved, through infinite travail and suffering, all of the orders, families, species, and varieties of animals that to-day live on the earth, and all those that have in the past lived and passed away. By the multiplication and specialisation of cells, and the formation of cell aggregates, the sponges, celenterates, and flat worms were developed from the protozoa.^[1] The connecting links between the one-celled and the many-celled animals consist of a series of colonial forms of increasing size and complexity, some of which may be found in every roadside ditch and pool, while others are extinct. The development of these many-celled organisms (metazoa) from one-celled organisms was a perfectly natural process, a process which takes place in the initial evolutions of every embryo. There is no more mystery about it than there is about any other act of association. All association is simply a matter of ‘business.’ Many-celled organisms are colonies, or societies, of more or less closely co-operating one-celled organisms, and they have come into existence in obedience to the same laws of economy and advantage as have those more modern societies of metazoa known as nations, communities, and states, the organised bodies of men, ants, and millionaires.

The sponges are the lowest of the many-celled animals. They consist of irregular masses of loosely associated cells, hopelessly anchored to the sea-floor. They represent the social instinct in embryo. The cells are but slightly specialised, and each cell leads a more or less independent existence. The sponge stands at about that stage of social integration and intelligence represented by those stupendous porifera which cover continents and constitute the ‘social organisms’ of the civilised world. The nutritive system of sponges consists of countless pores opening from the surface into a common canal within, through which ever-waving cilia urge the alimental waters. In the celenterates the cells arrange themselves in the form of a cup with one large opening into and from the vase-like stomach. The unsegmented worms are flat and sac-like, with bilateral symmetry and the power to move about, but not tubular, as are the true worms. They are bloodless, like the celenterates and sponges.

From the flat worms developed the annelid worms, animals perforated by a food canal and possessing a body cavity filled with blood surrounding this canal. The body cavity is the space between the walls of the body and the alimentary canal, the cavity which in the higher animals contains the heart, liver, lungs, kidneys, etc. The worms and all animals above them have this cavity. The worms and all animals above them also have, as an inheritance from the flat worms, bodies with bilateral symmetry—that is, bodies with two halves similar. This peculiarity was probably acquired by the flat worms, and so fastened upon all subsequently evolved species, as a result of pure carelessness. It probably arose out of the habit of using continually, or over and over again, the same parts of the body as fore and aft. It has been facetiously said that if it had not been for this habit, so inadvertently acquired by these humble beings so long, long ago, we would not to-day be able to tell our right hand from our left. In the worm is found the beginning of that wonderful organ of co-ordination, the brain. The brain is a modification of the skin. It may weaken our regard for this imperial organ to know that it is, in its morphology, akin to nails and corns. But it will certainly add to our admiration for the infinite labours of evolution to remember that the magnificent thinking apparatus of modern philosophers was originally a small sensitive plate developed down in the sea a hundred million years ago on the dorsal wall of the mouths of primeval worms.

From the worms developed all of the highest four phyla of the animal kingdom—the echinoderms, the mollusks, the arthropods, and the chordate animals, the last of which were the progenitors of the illustrious vertebrates. The lowest of the mollusks are the snails, and from these humble tenants of our ponds and shores sprang the headless bivalves and the giant jawed cuttles. The mollusks were for a long time after their development the mailed monarchs of the sea, and shared with the worms the dominion of the primordial waters. But after the development of the more active arthropods, especially the crustaceans, the less agile worms and mollusks rapidly declined. Existing worms and mollusks are remnants of once powerful and populous races.

From the worms also developed the arthropods, the water-breathing crustaceans and the air-breathing spiders and insects. The crustaceans came early, away back in the gray of the Silurian period, just about the time North America was born. North America lay, a naked, V-shaped infant, in the regions of Labrador and Canada. The crustaceans rapidly superseded the mollusks as rulers of the sea, attaining, in extreme species, a length of four or five feet. The spiders and Insects came into existence toward the latter part of the Silurian period,^[2] probably contemporaneous, or nearly so, with the appearance of land vegetation. The spiders and insects were the aborigines of the land and air. They are the only races of living beings, except the original inhabitants of the sea, who ever invaded and settled an unoccupied world. The earliest land fossils so far found are the fossils of scorpions. But the existence of a sting among the structural possessions of these animals indicates that there were already others who contended with them for supremacy in the new world. The first insects were the masticating insects, insects such as cockroaches, crickets, grasshoppers, dragon-flies, and beetles. They are found abundantly in the Devonian and Carboniferous rocks. The licking insects (bees) and the pricking insects (flies and bugs) appeared first in the Mesozoic Era, and the sipping insects (butterflies) in the Cenozoic. The flower-loving insects (the bees and butterflies) came into the world at the same time as did the flowers. The wings of insects may be modifications of the gills used by insect young in respiration during their aquatic existence. They are, hence, very different in origin from the wings of birds, which are the modified fore-legs of reptiles.

The most important class of animals arising out of the worms, on account of their distinguished offspring, were the hypothetical cord animals. The only existing species allied to these animals is the amphioxus, a strange, unpromising-looking creature, half worm and half fish, found in the beach sands of many seas. It has white blood and a tubular heart. It is without either head or limbs, and looks very much like a long semitransparent leaf, tapering at both ends. But it has two unmistakable prophecies of the vertebrate anatomy: a cartilaginous rod, pointed at both ends, extending along the back, and above this, and parallel to it, a cord of nerve matter. These are the same positions occupied by the spinal column and spinal cord in all true vertebrates. That the amphioxus is a genuine relative of the ancestor of the vertebrates is also shown by the fact that these simple forms of column and cord possessed by amphioxus are precisely the forms assumed by the spinal column and spinal cord in the embryos of all vertebrates, including man.

From these quasi-vertebrates developed the fishes—first (after the scaleless, limbless lampreys) the sharks with spiny scales and cartilaginous skeleton, and after these the lung fishes and the bony fishes, with flat, horny scales and skeletons of bone. From the beginning of the Devonian age, when fishes first came into prominence, till the rise of the great reptiles in the Triassic time, fishes were the dominant life of the sea. In the fishes first appeared jaws, a sympathetic nervous system, red blood, backbone, and the characteristic two pairs of limbs of vertebrates.

The lung fishes (Dipneusta), a small order of strange salamander-like creatures which live ingeniously on the borderland between the liquid and the land, may be looked upon as physiological, if not morphological, links between the fishes and the frogs. They combine the characters of both fishes and frogs, and zoologists have been tempted to make a separate class of them, and place them between the two classes to which they are related. They are like fishes in having scales, fins, permanent gills, and a fish-like shape and skeleton. They resemble frogs in having lungs, nostrils, an incipiently three-chambered heart, a pulmonary circulation, and frog-like skin glands. There are three genera with several species. One genus (Neoceratodus) is found in two or three small rivers of Queensland, Australia; another (Protopterus) lives in the Gambia and other rivers of Africa; and the third (Lepidosiren) inhabits the swamps of the Amazon region. They all breathe ordinarily by means of gills, like true fishes, but have the habit of coming frequently to the surface and inhaling air. The air-bladder acts as an incipient lung in supplementing respiration by gills. They all live in regions where a dry season regularly converts the watercourses into beds of sand and mud. During the season of drought these strange animals build for themselves a cocoon or nest of mud and leaves. This cocoon is lined with mucus, and provided with a lid through which air is admitted. Here they lie in this capsule throughout the hot southern summer, from August to December, breathing air by means of their lungs and living upon the stored-up fat of their tails, until the return of the wet season, when they again live in the rivers and breathe water in true piscatorial fashion. These capsules have often been carried to Europe, and opened 3,000 miles from their place of construction without harming the life within.

Here, in these eccentric denizens of the southern world, we find the beginnings of a grand transformation—a transformation in both structure and function, a transformation made necessary by the transition from life in the water to life in the air, a transformation which reaches its maturity in the higher air-breathing vertebrates, where the simple air-sac of the fish becomes a pair of lobed and elaborately sacculated lungs, performing almost exclusively the function of respiration, and the gills change into parts of the ears and lower jaw.

The air-bladder of ordinary fishes, which is used chiefly as a hydrostatic organ to enable the fish to rise and fall in the water, is probably the degenerated lung of the lung fishes.

From the lung fishes or allied forms developed the amphibians, the well-known fish quadrupeds of our bogs and brooks. The amphibians are genuine connectives—living links between the life of the sea and the life of the land. In early life they are fishes, with gills and two-chambered hearts. In later life they are air-breathing quadrupeds, with legs and lungs and three-chambered hearts. Here is evolution, plenty of it, and of the most tangible character. And it takes place right before the eyes. The transformation from the fish to the frog is, however, no more wonderful than the embryonic transformations of other vertebrates. It is simply more apparent, because it can be seen. The lungs of amphibians and the lower reptiles are simple sacks opening by a very short passage into the mouth. Some amphibians, as the axolotl of Mexican lakes, ordinarily retain their gills through life, but may be induced to develop lungs and adapt themselves to terrestrial life by being kept out of the water. Others, as the newts, which ordinarily develop lungs, may be compelled to retain their gills through life by being forced to remain uninterruptedly in the water. The black salamander, inhabiting droughty regions of the Alps, brings forth its young bearing lungs, and only a pair at a time. But if the young are prematurely removed from the body of the mother and placed in the water, they develop gills in the ordinary way. These are remarkable instances of elasticity in the presence of a varying environment.

In the amphibians the characteristic five-toed or five-fingered foot, which normally forms the extremities of the limbs of all vertebrates except fishes, is first met with. It was this pentadactyl peculiarity of the frog, inherited by men and women through the reptiles and mammals, that gave rise to the decimal system of numbers and other unhandy facts in human life. The decimal system arose out of the practice of early men performing their calculations on their fingers. This method of calculating is still used by primitive peoples all over the world. The sum of the digits of the two hands came, in the course of arithmetical evolution, to be used as a unit, and from this simple beginning grew up the complicated system of tens found among civilised peoples. It has all come about as a result of amphibian initiative. Our very arithmetics have been predetermined by the anatomical peculiarities of the frog’s foot. If these unthinking foreordainers of human affairs had had four or six toes on each foot instead of five, man would no doubt have inherited them just as cheerfully as the number he did inherit, and the civilised world would in this case be to-day using in all of its mathematical activities a system of eights or twelves instead of a system of tens. A system of eights or twelves would be much superior in flexibility to the existing system; for eight is a cube, and its half and double are squares; and twelve can be divided by two, three, four, and six, while ten is divisible by two and five only.

How helpless human beings are—in fact, how helpless all beings are! How hopelessly dependent we are upon the past, and how impossible it is to be really original! What the future will be depends upon what the present is, for the future will grow out of, and inherit, the present. What the present is depends upon what the past was, for the present has grown out of, and inherited, the past. And what the past was depends upon a remoter past from which it evolved, and so on. There is no end anywhere of dependence, either forward or backward. Every fact, from an idea to a sun, is a contingent link in an eternal chain.

From the amphibians (probably from extinct forms, not from living) there arose the highest three classes of vertebrates—the true reptiles, the birds, and the mammals—all of whom have lungs and breathe air from the beginning to the end of their days. Gills, as organs of breathing, disappear forever, being changed, as has been said, into parts of the organs of mastication and hearing. In the reptiles first appear those organs which in the highest races overflow on occasions of tenderness and grief, the tear glands. These organs are, however, in our cold-blooded antecedents, organs of ocular lubrication rather than of weeping. There are but four small orders of existing reptiles—snakes, turtles, lizards, and crocodilians. These are the pygmean descendants of a mighty line, the last of a dynasty which during the greater part of the Mesozoic ages was represented by the most immense and powerful monsters that have ever lived upon the earth. Mesozoic civilisation was pre-eminently saurian. Reptiles were supreme everywhere—on sea and land and in the air. Their rulership of the world was not so bloody and masterful as man’s, but quite as remorseless. Imagine an aristocracy made up of pterosaurs (flying reptiles), with teeth, and measuring 20 feet between wing-tips; great plesiosaurs (serpent reptiles) and ichthyosaurs (fish reptiles), enormous bandits of the seas; and dinosaurs and atlantosaurs, giant land lizards, 30 feet high and from 50 to 100 feet in length. A government of demagogs is bad enough, as king-ridden mankind well know, but dragons would be worse, if possible. The atlantosaurs were the largest animals that have ever walked upon the earth. They were huge plant-eaters inhabiting North America. It has been surmised that one of these behemoths ‘may have consumed a whole tree for breakfast.’ It was the mighty saurians of the Mesozoic time who brought into everlasting subordination the piscatorial civilisation of the Devonian and carboniferous ages.

Toward the latter part of the Reptilian Age, and somewhere along about the time of the appearance of hard-wood forests, came the birds, those beautiful and emotional beings who, in spite of human destructiveness, continue to fill our groves and gardens with the miracles of beauty and song. The bird is a ‘glorified reptile.’ How the ‘slow, cold-blooded, scaly saurian ever became transformed into the quick, hot-blooded, feathered bird, the joy of creation,’ is a considerable mystery, yet we know no reason for believing that the transformation did not take place. Although in their external appearance and mode of life birds and reptiles differ so widely from each other, yet, in their internal structure and embryology, they are so much alike that one of the brightest anatomists that has ever lived (Huxley) united them both into a single class under the name Sauropsida. It might naturally be supposed that the birds are descendants of the flying reptiles, the pterosaurs. But this may not be true. The pterosaurs were structurally much further removed from the birds than were certain extinct terrestrial reptiles. The fact that birds and pterosaurs both had wings has really nothing to do with the case. For the wings of reptiles, we almost know, were not homologous with the wings of birds. The bird’s wing is a feathered fore-leg; the wing of the reptile was an expanded skin stretching from the much-elongated last finger backwards to the hind-leg and tail. Wings, it may be remarked in passing, have had at least four different and distinct beginnings in the animal kingdom, represented by the bats, the birds, the reptiles, and the insects. This does not include the parachutes of the so-called flying squirrels, lemurs, lizards, phalangers, and fishes.

The first birds had teeth and vertebrated tails. The archeopteryx, which is the earliest toothed bird whose remains have yet been found, was about the size of a crow. It had thirty-two teeth and twenty caudal vertebrae. Two specimens of it have been found in the Jurassic slates of Bavaria. One of these fossils is in the British Museum, and the other in the Museum of Berlin. Other toothed birds have been found fossil by Dr. Mudge in the cretaceous chalk of North America. These last had short, fan tails like existing birds.

From the toothed birds developed the beaked birds—the keel-breasted birds (the group to which most existing birds belong) and the birds with unkeeled breasts, i.e., the ostrich-like birds. The ostrich-like birds are runners. They have rudimentary wings, and the keel of the breast-bone, which in the keel-breasted birds acts as a stay for the attachment of the wing muscles, is lacking. The ostrich-like birds are probably degenerate flyers, the flying apparatus having become obsolete through disuse. The feathers of birds are generally supposed to be the modified scales of reptiles.

The most brilliant offspring of the reptiles were the mammals, animals capable of a wider distribution over the face of the earth than the cold-blooded reptiles, on account of their hair and their warm blood. Cold-blooded animals of great size are able to inhabit but a small zone of the existing earth’s surface—the torrid belt. They cannot house themselves during the seasons of cold, as men can; nor escape to the tropics on the wings of the wind, as do the birds; nor bury themselves in subaqueous mud, as do the frogs, snakes, and crustaceans. During the Mesozoic period, when cold-blooded reptiles of gigantic size flourished over a wide area of the earth’s surface, the planet was far warmer than now. Animals, therefore, like the mammals (or birds), capable of maintaining a fixed temperature regardless of the thermal fluctuations of the surrounding media, are the only animals of large size and power capable of uninterrupted existence over the greater part of the surface of the existing earth. The pre-eminent life of the Cenozoic time was mammalian. But the decline and fall of the saurian power was not wholly due to the rise of the more dynamic mammals. It was in part due, no doubt, to adverse conditions of climate, and also to the fact that mammals and birds guard their eggs, and saurians do not.

The lowest of the mammals are the monotremes, animals which blend in a marvellous manner the characteristics of birds, reptiles, and mammals. Only two families of these old-fashioned creatures are left, the echidna and the duck-bill (ornithorhynchus), both of them found on or near that museum of biological antiquities, Australia. They are covered with hair and suckle their young like other mammals, but they have only the rudiments of milk glands, and they lay eggs with large yolks from a cloaca, like the reptiles and birds. The duck-bill hides its eggs in the ground, but the echidna hatches its eggs in a small external brooding pouch, periodically developed for this purpose. The young of the monotremes feed on the oily perspiration which exudes from the body of the mother. The monotremes first appear in the fossiliferous rocks of the Triassic Age.

From the monotreme-like mammals developed the marsupial mammals, animals possessing a purse-like pouch on the after part of the abdomen, in which they carry their young. The young of marsupials are born in an extremely immature state, and are carried in this pouch in order to complete their development. The young of the kangaroo, an animal as large as a man, are only about an inch in length when they are born. They are carried for nine months after their birth in the marsupium of the mother, firmly attached to the maternal nipple. The marsupials came into existence during the Jurassic Age, and during the next age, the Cretaceous, they arose to considerable power. During this latter age they were found on every continent. But they have been almost exterminated by their more powerful descendants.

From the marsupials developed the placental mammals, animals so called because their young are developed within the parental body in association with a peculiar nourishing organ called the placenta. From the herbivorous marsupials developed the almost toothless edentates, the rodents, or gnawing animals, the sirenians, the cetaceans, and the hoofed animals, or ungulates. The sirenians are fish-like animals with two flippers, and are often called sea-cows. They resemble whales in many respects, and are sometimes classed with them. They are plant-eaters exclusively, and are found grazing along the bottoms of tropical estuaries and rivers. They have tiny eyes, teeth fitted for grinding (not spike-like as in the whales), and a strong affection for their young, the mother, when pursued, often carrying her little one under her flippers. An immense sirenian, known as Steller’s manatee, was discovered on the Behring Islands, along the Kamschatka coast, in 1741. Twenty-seven years afterwards not one of them was left, all having been murdered by the Russian sailors. The sirenians are probably degenerate forms of land quadrupeds, having lost their hind-limbs and developed the fish-like shape in adapting themselves to aquatic conditions. They appear first in the Eocene Age.

Among the most interesting derivatives of the herbivorous marsupials, because the most aberrant, are the whales. They are true mammals—have warm blood, breathe the air with lungs, and suckle their young like other mammals. But, like the sirenians, they live in the surface of the waters, and have flippers and a fish-like tail and form. They differ from the sirenians, however, in being carnivorous, in having inguinal instead of pectoral milk glands, and in being structurally less like quadrupeds. They probably degenerated from land quadrupeds during the Jurassic period, and, owing to their longer residence in the waters, have become further removed from the quadrupedal type than the sirenians. Whales have two limbs, the hind-limbs having disappeared as a result of the pre-eminent development of the tail. The tails of whales and sirenians are flattened horizontally, not vertically, as in fishes.

Out of generalised forms of hoofed animals now extinct developed the odd-toed and even-toed races of existing ungulates. The original ungulates had five hoofs on each foot, and were highly generalised in their structure. From these original five-toed forms have arisen the variously hoofed and variously structured tribes of existing ungulates: the five-toed elephant, the four-toed tapir and hippopotamus, the three-toed rhinoceros, the two-toed camel, sheep, swine, deer, antelope, giraffe, and ox, and the one-toed horse and zebra.

The carnivorous branch of the placental animals came from the carnivorous branch of the marsupials. From early forms of carnivorous placentals developed the ape-like lemurs and those generalised forms of rapacious animals from which arose the insect-eaters, the bats, and the true carnivora. The seals represent a by-development from the main line of the carnivora, a third defection, and a comparatively recent one, from land faunas. Seals live at the meeting of the land and the waters rather than in or on the waters, as do the cetaceans and sirenians. They have retained their fur and their four limbs, but have almost lost their power of land locomotion by the conversion of their feet into flippers. The two front-limbs of seals are the only ones used as ordinary limbs are used. The hind-limbs in most seals stretch permanently out behind, the webbed digits spreading out fan-shaped on either side of the stumpy tail, and constituting a rowing apparatus functionally homologous with the tail of fishes and whales. According to Jordan, the fur seals and the hair seals are descended from different families of land carnivora, the former probably from the bears, and the latter from the cats.

The lemurs are of especial interest to human beings, because in them are found the first startling approximation in looks and structure to the ‘human form divine.’ The lemurs are monkey-like creatures living in trees, but differ enough from true monkeys to be often placed in an order by themselves. Their milk glands are abdominal instead of pectoral, as in the monkeys, and the second digit of each hand and foot ends in a claw. The most of them live in Madagascar. They are generally nocturnal in their habits, although some species are diurnal. They appear first in the Eocene rocks, and Haeckel thinks they may have developed from opossum-like marsupials in the late Cretaceous or early Eocene Age.

From lemurs or from some other similar sort of semi-apes developed the true apes—the flat-nosed (platyrhine) apes of the New World and the narrow-nosed (catarhine) apes of the Old World. There is considerable difference between the New World apes and those of the Old World. The differences between the two classes is, in fact, so striking that they are thought by some to have developed independently of each other from distinct species of semi-apes. The apes of the New World have flat noses, and the nostrils are far apart and open in front of the nose, never below. The Old World apes have narrow noses, the nostrils being close together and opening downwards as in man. The tail of (nearly) all New World apes is prehensile, being used regularly as a fifth limb, while among Old World apes the tail is never so used. The Old World apes all have the same number and kinds of teeth as man has, while the New World apes (excepting the Brazilian marmosets) have an additional premolar in each half-jaw, making thirty-six in all. The catarhine apes are, therefore, structurally much nearer to man than their platyrhine cousins. All tailed apes probably sprang originally from a single stirp of semi-apes, and spread over the earth at a time when the eastern and western land masses of the southern hemisphere were connected with each other. The earliest remains of apes appear in the Miocene Age.

From the Old World tailed apes were developed the tailless, man-like, or anthropoid apes—the gorillas and chimpanzees of Africa, and the orangs and gibbons of Asia and the East Indies. The anthropoids arose from the tailed apes by the loss of the tail, the thinning of the hairy covering, the enlargement of the fore-brain, and by structural adaptations to a more nearly vertical position. No remains of anthropoids are found earlier than the Pliocene Age.

The man-like apes are the nearest living relatives of the human races. It is not probable that man has been derived directly from any of the existing races of man-like apes. For no one of them in all particulars of its structure stands closer to him than the rest. The orang approaches closest to man in the formation of the brain, the chimpanzee in the shape of the spine and in certain characteristics of the skull, the gorilla in the development of the feet and in size, and the gibbon in the formation of the throat and teeth. The earliest human races probably sprang from man-like races of apes now extinct, who lived in southern Asia or in Africa during the Pliocene Age (possibly as early as the Miocene), and who combined in their structures the various man-like characters possessed by existing anthropoids.

The earliest races of men were speechless—the ape-like ‘Alali’—beings, living wholly upon the ground and walking upon their hind-limbs, but without more than the mere rudiments of language. The vertical position led to a much greater development of the posterior parts, especially of the muscles of the back and the calves of the leg. The great toe, which in the ape is opposable, lost its opposability, or all except traces of it, after the abandonment of arboreal life. It must have been a sight fit to stir the soul of the most leathern, these children of the night, with low brows, stooping gait, and ape-like faces, armed with rude clubs, clothed in natural hair, and wandering about in droves without law, fire, or understanding, hiding in thickets and in the holes of the earth, feeding on roots and fruits, and contending doubtfully with the species around them for food and existence.

From the ‘Alali’—the speechless ape-men—we may imagine the true men to have evolved—talking men, men with erect posture and mature brain and larynx, the woolly-haired ulotrichi and the straight-haired lissotrichi. There are four existing species of woolly-haired men: the Papuans of New Guinea and Melanesia, and the Hottentots, Caffres, and Negroes of southern, equatorial, and north central Africa respectively. They all have long heads, slanting teeth, very dark skin, and black, bushy hair, each individual hair in cross-section being flat or oval in shape. In the straight-haired races the skin is much fairer than in the woolly-haired races, being seldom darker than brown, and each individual hair in cross-section is round like the cross-section of a cylinder. The principal species of straight-haired men are the sea-roving Malays of the East Indies and the Pacific, the round-faced Mongols of eastern and northern Asia, the aboriginal Americans of the western hemisphere, and the incomparable Aryans, including the ancient Greeks and Romans and the modern peoples of India, Persia, and Europe.

Man is to-day the pre-eminent animal of the planet. The successive ascendancies of the Worm, the Mollusk, the Crustacean, the Fish, the Reptile, and the Mammal, are followed triumphantly by the ascendancy of the Children of the Ape.

A large part of the life of the earth has remained steadfastly where it was cradled, beneath the waves. But more restless portions have left the sea and crept forth upon the land, or swarmed into the air. One migration, the most numerous, is represented by the insects. Another, the most enterprising, was the amphibian. After ages of evolution the amphibian branch divided. One branch acquired wings and sailed off into the air. The other divided and subdivided. One of these subdivisions entered the forests, climbed and clambered among the trees, acquired perpendicularity and hands, descended and walked upon the soil, invented agriculture, built cities and states, and imagined itself immortal. Human society is but the van—the hither terminus—of an evolutional process which had its beginning away back in the protoplasm of primeval waters. There is not a form that creeps beneath the sea but can claim kinship with the eagle. The philosopher is the remote posterity of the meek and lowly amoeba.

[1.] See ‘Genealogy of Animals,’ at the end of the chapter.
[2.] See table of geological ages, at the end of the previous chapter.

XI. Conclusion.

The resemblances, homologies, and metamorphoses existing everywhere among animal forms are, therefore, evidence of the most logical consanguinities. It is all so perfectly plain. The structures of organic beings have come about as a result of the action and reaction of environment upon these structures. Every being—and not only every being, but every species, the whole organic world—has come to be what it is as a result of the incessant hammerings of its surroundings, the hammerings not only of the present, but of the long-stretching past. By surroundings is meant, of course, the rest of the universe. Those animals belonging to the same stock resemble each other because they have been subjected to the same experiences, the same series of selections. They have lain on the same great anvil, and felt the down-comings of the same sledge. The similarities among animal forms in general indicate relationships, just as the similarities among the races of men indicate racial consanguinities. All men belong to the human species because they are all fundamentally alike. But there are differences in the character of the hair, in the colour of the skin, in the conformation of the skull, and in the structure of the language, among the different varieties of the species, indicating striking variety in relationship and origin. An eminent biologist has said that if Negroes and Caucasians were snails they would be classed as entirely distinct species of animals. Whether, as is thought by some, the woolly-haired races are the descendants of the African anthropoids, and the straight-haired varieties are the posterity of the orangs and gibbons, we may never know positively. But we do know that these two great branches of mankind must have different genealogies, extending to a remote antiquity, and that the varieties belonging to each great group sustain to each other the relations of a common kinship. Englishmen look like each other, act like each other, and speak the same language. So do Frenchmen and Swedes and Chinese. Every people is peculiar. This is not the result of accident or agreement, but the result of law. Mongolians do not all have short heads, yellow faces, slanting eyes, and prominent malars because they have agreed to have them, but as a result of a common pedigree. Similarity of structure implies commonalty of origin, and commonalty of origin means consanguinity.

And this is true whether you contemplate the featural resemblances of brothers and sisters of the same human parent, or those more fundamental characteristics which distinguish species, orders, and sub-kingdoms. All animals are composed of protoplasm, which is a compound of clay, because all animals are descended from the same first parents, protoplasmic organisms evolved out of the elemental ooze. All vertebrates have nerve-filled backbones with two pairs of ventrally branching limbs, because the original ancestors of the vertebrates had nerve-filled backbones with two pairs of ventrally branching limbs. Insects individually evolve from worms because worms are their phylogenetic fathers and mothers. Man has hands and a vertical spine, and walks on his hind-limbs, not because he was fashioned in the image of a god, but because his ancestors lived among the trees. The habit of using the posterior limbs for locomotion, and the anterior for prehension, and the resulting perpendicular, are peculiarities developed by our simian ancestors wholly on account of the incentives to such structure and posture afforded by aboreal life. These peculiarities would not likely have been acquired by quadrupeds living upon and taking their food from a perfectly level and treeless plain. If there had been no forests on the earth, therefore, there would have been no incentive to the perpendicular, and the ‘human form divine’ would have been inconceivably different from what it is to-day. And if fishes had had three serial pairs of limbs instead of two, and their posterity had inherited them, as they certainly would have had the foresight to do if they had had the opportunity, the highest animals on the earth to-day, the ‘paragons of creation,’ would probably be two-handed quadrupeds (centaurs) instead of two-handed bipeds. And much more efficient and ideal individuals they would have been in every way than the rickety, peculiar, unsubstantial plantigrades who, by their talent to talk, have become the masters of the universe, and, by their imaginations, ‘divine.’

Kinship is universal. The orders, families, species, and races of the animal kingdom are the branches of a gigantic arbour. Every individual is a cell, every species is a tissue, and every order is an organ in the great surging, suffering, palpitating process. Man is simply one portion of the immense enterprise. He is as veritably an animal as the insect that drinks its little fill from his veins, the ox he goads, or the wild-fox that flees before his bellowings. Man is not a god, nor in any imminent danger of becoming one. He is not a celestial star-babe dropped down among mundane matters for a time and endowed with wing possibilities and the anatomy of a deity. He is a mammal of the order of primates, not so lamentable when we think of the hyena and the serpent, but an exceedingly discouraging vertebrate compared with what he ought to be. He has come up from the worm and the quadruped. His relatives dwell on the prairies and in the fields, forests, and waves. He shares the honours and partakes of the infirmities of all his kindred. He walks on his hind-limbs like the ape; he eats herbage and suckles his young like the ox; he slays his fellows and fills himself with their blood like the crocodile and the tiger; he grows old and dies, and turns to banqueting worms, like all that come from the elemental loins. He cannot exceed the winds like the hound, nor dissolve his image in the mid-day blue like the eagle. He has not the courage of the gorilla, the magnificence of the steed, nor the plaintive innocence of the ring-dove. Poor, pitiful, glory-hunting hideful! Born into a universe which he creates when he comes into it, and clinging, like all his kindred, to a clod that knows him not, he drives on in the preposterous storm of the atoms, as helpless to fashion his fate as the sleet that pelts him, and lost absolutely in the somnambulism of his own being.

The Psychical Kinship

[The Conflict of Science and Tradition]
[Evidences of Psychical Evolution]
[The Common-sense View]
[The Elements of Human and Non-human Mind Compared]
[Conclusion]

‘I saw, deep in the eyes of the animals, the human soul look out upon me.’
‘I saw where it was born down deep under feathers and fur, or condemned for awhile to roam four-footed among the brambles. I caught the clinging mute glance of the prisoner, and swore that I would be faithful.’
‘Thee, my brother and sister, I see and mistake not. Do not be afraid. Dwelling thus and thus for awhile, fulfilling thy appointed time—thou too shalt come to thyself at last.’
‘Thy half-warm horns and long tongue lapping round my wrist do not conceal thy humanity any more than the learned talk of the pedant conceals his—for all thou art dumb we have words and plenty between us.’

— Edward Carpenter.

The Psychical Kinship

I. The Conflict of Science and Tradition.

The doctrine that on mankind’s account all other beings came into existence, and that non-human beings are mere hunks of matter devoid of all psychic qualities found in man, is a doctrine about as sagacious as the old geocentric theory of the universe. Conceit is a distinctly human emotion. No other animal has it. But it has been lavished upon man with a generosity sufficient to compensate for its total absence from the rest of the universe. Man has always overestimated himself. In whatever age or province of the world you look down on the human imagination, you find it industriously digging disparities and establishing gulfs. Man, according to himself, has had great difficulty many times in the history of the world in escaping the divine. According to the facts, he has only in recent biological times and after great labour and uncertainty abandoned his tail and his all-fours. According to himself, man was made ‘in the image of his maker,’ and has been endowed with powers and properties peculiarly his own. According to the facts, he has come into the world in a manner identical with that of all other animals, and has been endowed with like nature and destiny. Man has never manifested a warmer or more indelicate enthusiasm than the enthusiasm with which he has appreciated himself. And with the same ardour with which he has praised himself he has maligned and misrepresented others. Man has set himself up as the supreme judge and executive of the world, and he has not hesitated to award to himself the lion’s share of everything. He has ransacked his fancy for adjectives with which to praise himself, and driven his inventive faculties to the verge of distraction in search of justification for his crimes upon those around him. Every individual bent on deeds of darkness first seeks in his own mind justification for his purposed sins. And it is a caustic comment on the character of human conviction that no enthusiastic criminal—from the marauder of continents to the kitchen pilferer—ever yet sought unsuccessfully at the court of his conscience for a sinful permit. It was an easy matter, therefore, for man—aided as he was by such an experienced imagination—to convince himself that all other animals were made for him, that they were made without feeling or intelligence, and that hence he was justified in using in any way he chose the conveniences so generously provided by an eccentric providence. But Darwin has lived. Beings have come into the world, we now know, through the operation of natural law. Man is not different from the rest. The story of Eden is a fabrication, bequeathed to us by our well-meaning but dimly-lighted ancestors. There has been no more miracle in the origin of the human species than in the origin of any other species. And there is no more miracle in the origin of a species than there is in the birth of a molecule or in the breaking of a tired wave on the beach. Man was not made in the image of the hypothetical creator of heaven and earth, but in the image of the ape. Man is not a fallen god, but a promoted reptile. The beings around him are not conveniences, but cousins. Instead of stretching away to the stars, man’s pedigree slinks down into the sea. Horrible revelation! Frightful antithesis! Instead of celestial genesis and a ‘fall’—long and doleful promotion. Instead of elysian gardens and romance—the slime. Instead of a god with royal nostrils miraculously animating an immortal duplicate—a little lounging cellule, too small to be seen and too senseless to distinguish between midnight and noon. But the situation is not half so horrible as it looks to be to those who see only the skin of things. Is it not better, after all, to be the honourable outcome of a straightforward evolution than the offspring of flunky-loving celestials? Are the illustrious children of the ape less glorious than the sycophants of irrational theological systems? Darwin dealt in his quiet way some malicious blows to human conceit, but he also bequeathed to a misguided world the elements of its ultimate redemption.

The supposed psychical gulf between human and non-human beings has no more existence, outside the flamboyant imagination of man, than has the once-supposed physical gulf. It is pure fiction. The supposition is a relic of the rapidly dwindling vanity of anthropocentricism, and is perpetuated from age to age by human selfishness and conceit. It has no foundation either in science or in common-sense. Man strives to lessen his guilt by the laudation of himself and the disparagement and degradation of his victims. Like the ostrich, who, pursued by death, improvises an imaginary escape by plunging its head into the desert, so man, pursued by the vengeful correctives of his own conscience, fabricates a fictitious innocence by the calumniation of those upon whom he battens. But such excuses cannot much longer hold out against the rising consciousness of kinship. Psychology, like all other sciences, is rapidly ceasing to attend exclusively to human phenomena. It is lifting up its eyes and looking about; it is preparing to become comparative. It has come to realise that the mind of man is but a single shoot of a something which ramifies the entire animal world, and that in order to understand its subject it is necessary for it to familiarise itself with the whole field of phenomenon. The soul of man did not commence to be in the savage. It commenced to be in the worm, whose life man grinds out with his heel, and in the bivalve that flounders in his broth. The roots of consciousness are in the sea. Side by side with physical evolution has gone on psychical evolution; side by side with the evolution of organs and tissues has gone on the evolution of intellect, sensibility, and will. Human nature and human mind are no more sui generis than are human anatomy and physiology. The same considerations that prove that man’s material organism is the cumulative result of long evolution proclaim that human mind, the immaterial concomitant of the material organism, is also the cumulative result of long evolution.

We might just as well recognise facts first as last, for they will have to be recognised some time. Truths are not put down by inhospitality—they are simply put off. The universe has a policy, a program. We may close our eyes to the facts around us, hoping in this way to compel them to pass away or be forgotten. But they do not pass away, nor will they be forgotten. They simply become invisible. They will live on and present themselves to other minds or ages or climes more hospitable or honest than our own. The only proper attitude of mind to assume toward the various doctrines existing among men is the attitude of perfect willingness to believe anything—anything that appeals to us as being reasonable and right. The great majority of men, however, are intellectual solids—unable to move and unwilling to think. They have certain beliefs to which they are determined to hold on, and everything that does not fit in with these beliefs is rejected as a matter of course.

II. Evidences of Psychical Evolution.

That mind has evolved, and that there is a psychical kinship, an actual consanguinity of feelings and ideas, among all the forms of animal life is proved incontestably by the following facts:

1. The evolution of mind is implied by the fact of the evolution of structures. ‘I hold,’ says Romanes, in the introduction to his great work on ‘Mental Evolution,’ ‘that, if the doctrine of organic evolution is accepted, it carries with it, as a necessary corollary, the doctrine of mental evolution.’ It makes no difference what theory we adopt regarding the essential natures of the physical and the psychical—whether we agree with the materialist that mind is an attribute of matter, with the idealist that matter is a creation of mind, with the monist that mind and body are only different aspects of the same central entity, or with the dualist that body and soul are two distinct but temporarily dependent existences—we must in any case recognise the fact, which is perceived by all, that there is an ever-faithful parallel between the neural and psychical phenomena of every organism. And if the elements which enter into and make up the physical structure of man have been derived from, and determined by, preceding forms of life, the elements which enter into and make up the psychical counterpart of the physical have also, without any doubt, been inherited from, and determined by, ancestral life forms.

2. Closely allied to the foregoing reason for a belief in the evolution of mind is that derived from a comparative survey of the nervous system in man and other animals. In man, mind is closely associated with a certain tissue or system of tissues—nerve tissue or the nervous system. That mind is correlated with nerve structure, and that mental anatomy may be learned from a study of the anatomy of the nervous system, especially of the brain, is the basic postulate of the science of physiological psychology. Now, nerve cells exist in all animals above the sponge, and a comparatively well-developed nervous system is found even among many of the invertebrates, as the higher worms, crustaceans, insects, and mollusks. The nervous system of invertebrates, though composed of the same kind of tissue, is constructed according to a somewhat different plan of architecture from that of the vertebrates. But in all of the great family of backboned animals the nervous system is built on the same general plan as in man, with a cerebro-spinal trunk extending from the head along the back and motory and sensory nerves ramifying to all parts of the body. There is also a sympathetic nervous system in all animals down as far as the insects. The brain, which is the most important part of the nervous system, and which has been called the ‘organ of consciousness,’ presents throughout the animal kingdom, from its beginning in the worms to man, a graduated series of increasing complication proceeding out of the same fundamental type. This is especially true of the vertebrates. Fishes, amphibians, reptiles, birds, and mammals, all have in their brains the same primary parts, the same five fundamental divisions, as are found in the brain of man. Hence, whatever may be thought about the mental states of invertebrates, we have the right, in the case of the vertebrate orders of life, to infer, from the general similarity of their nervous system to our own, that they have a corresponding similarity to ourselves in mental constitution and experience.

3. The evolution of mind is suggested by the existence in the animal world of all grades of intelligence, from almost mindless forms to forms even exceeding in some respects the mental attainments of men. The jelly-fish and the philosopher are not mental aliens. They are linked to each other by a continuous gradation of intermediate intelligences. The existence of these grades of mental development suggest psychical evolution and kinship, just as the existence of like grades of structural development suggest physical evolution.

4. In the mental life of animals the same factors of evolution exist as those by means of which organic structures have been brought into existence, and it is reasonable to suppose that the operation of these factors have produced in the mental world results analogous to those produced by the operation of the same factors among organic structures.

Men and other animals vary in their natures and mental faculties quite as much as they do in colour, size, and shape. It is commonly supposed that the mental and temperamental variety existing among individual men does not exist among individual birds, quadrupeds, insects, etc. But a little observation or reflection ought to be enough to convince anyone that such a supposition belongs to that batch of pre-Darwinian mistakes presented to us by an over-generous past. We are not acquainted with the inhabitants of our fields and barn-yards. We are almost as ignorant of the mental life and personality of these door-yard neighbours and friends of ours as we would be if they were the inhabitants of another continent. That is why our obtuse minds lump them together so indiscriminately—we do not know anything about them. We never take the trouble, or think it worth while, to get acquainted with them, much less to study and know them. We have grown up in the falsehood that they are altogether different from what we are, and that it is really not worth while to bother our gigantic heads about them, except to use them when it comes handy, or kick them to one side, or execute them, when they get in the way. Everybody else looks at the matter in about the same way, so we just let it go at that.

There is a sameness about foreigners and other classes of human beings with whom we are but slightly, or not at all, acquainted, until we come to know them and can discriminate one from another. I remember once asking my sister, if her baby, which looked to me like all other babies I had ever seen, were mixed up with a lot of other babies of about the same age, whether she could pick hers out from all the rest, and she gave me an unmistakable affirmative by answering, ‘What a foolish question!’

There is less variety among the individuals of non-human races than among individual men, just as there is less variety among individual savages than among the members of a civilised community. But there is mental diversity among all beings, and we only need to whittle our observation a little to recognise the fact. You never hear the keeper of a menagerie or any intelligent associate of dogs, horses, birds, or insects say there is no individuality among these animals. Brehm, the great German naturalist, assures us that each individual monkey of all those he kept tame in Africa had its own peculiar temper and disposition. And this is no more than what everyone who knows anything about it knows to be true of dogs, horses, cats, cattle, birds, and even fishes and insects. Any intelligent dog-fancier or pigeon-fancier can tell you the personal peculiarities of every one of the fifty or a hundred dogs or pigeons in his charge. He has watched and studied them since they came into existence, and through this continuous association he has come to know them. He simply makes discriminations that are not made by the casual or superficial observer. The Laplander knows and names each reindeer in his herd, though to a stranger they are all as much alike as the multitudes on an ant-hill. The Peckhams of Milwaukee, those indefatigable investigators of spiders and insects, are constantly telling us of the wonderful individuality possessed by these lowly lessees of our fields and gardens. In their work on ‘The Habits and Instincts of the Solitary Wasps,’ speaking of the ammophiles, these authors say: ‘In this species, as in every one that we have studied, we have found a most interesting variation among the different individuals, not only in methods, but in character and intellect. While one was beguiled from her hunting by every sorrel blossom she passed, another stuck to her work with indefatigable perseverance. While one stung her caterpillars so carelessly and made her nest in so shiftless a way that her young could survive only through some lucky chance, another devoted herself to these duties not only with conscientious earnestness, but with an apparent craving after artistic perfection that was touching to see.’ The variation in the mental phenomena of animals, including man, is partly innate, and partly the result of environment or education.

Animals not only vary in their mental qualities, but they also inherit these variations, just as they do physical properties and peculiarities. Evidence of this is furnished by every new being that comes into the world. Insanity runs in families, and so does genius and criminality. Even the most trifling idiosyncrasies are often transmitted, not only by men, but also by dogs, horses, and other animals. Such qualities of mind as courage, fidelity, good and bad temper, intelligence, timidity, special tastes and aptitudes, are certainly transmitted in all the higher orders of animal life.

Animals are also selected, are enabled to survive in the struggle for life quite as much through the possession by them of certain mental qualities as on account of their physical characters. Whether the selections are made by nature or by man, they are not determined by the physical facts of size, strength, speed, and the like, more than by cunning, courage, sagacity, skill, industry, devotion, ferocity, tractability, and other mental properties. The fittest survive, and the fittest may be the most timid or analytic as well as the most powerful. No better illustration of this truth can be found than that furnished by man himself. Man is by nature a comparatively feeble animal. He is neither large nor powerful. Yet he has been selected to prosper over all other animals because of his ingenuity, sympathy, and art. The great feeling and civilisation of higher men have been built up by slow accretion due to the operation of the law of survival extending over vast measures of time. Creeds and instincts, governments and impulses, forms of thought and forms of expression, have struggled and survived just as have cells and species. A struggle for existence is constantly going on, as Max Müller has pointed out, even among the words and grammatical forms of every language. The better, shorter, easier forms are constantly gaining the ascendancy, and the longer and more cumbrous expressions grow obsolete.

If, therefore, the higher types of mind have not come into existence as have the higher types of structure, through evolution from simpler and more generalised forms, it has not been due to the absence of the factors necessary for bringing about this evolution.

5. The presumption created by the existence of the factors of psychic evolution is strengthened by the facts of artificial selection. We know mind can evolve, for it has done so in many cases. The races of domesticated animals, the races whom man has exploited and preyed upon during the past several thousand years, have, many of them, been completely changed in character and intelligence through human selection. Old instincts have been wiped out and new ones implanted. In many instances the psychology has been not only revolutionised, but remade.

Take, for instance, the dog. The dog is a reformed bandit. It is a revised wolf or jackal. It has been completely transformed by human selection; indeed, it may be said that the dog in the last ten or fifteen thousand years has made greater advances in sagacity and civilisation than any other animal, scarcely even excepting man. Man has made wonderful strides along purely intellectual lines, but in the improvement of his emotions he has not been so successful. The rapid development of the dog in feeling and intelligence has no doubt been due to the fact that his utility to man has always depended largely on his good sense and fidelity, and man has persistently emphasised these qualities in his selection. Fierceness and distrust—two of the most prominent traits in the psychology of the primitive dog—have been entirely eradicated in the higher races of dogs. There is not anywhere on the face of the earth a more trustful, affectionate, and docile being than this one-time cut-throat. Whether the dog has been derived from the wolf or from some wild canine race now extinct, or from several distinct ancestors, he must have had originally a fierce, distrustful, and barbaric nature, for all of the undomesticated members of the dog family wolves, foxes, jackals, etc.—have natures of this sort.

There are about 175 different races of domestic dogs. They represent almost as great a range of development as do the races of men. Some of them are exceedingly primitive, while others are highly intelligent and civilised. The Eskimo dogs are really nothing but wolves that have been trained to the service of man. They look like wolves, and have the wolf psychology. They are not able to bark, like ordinary dogs; they howl like wolves, and their ears stand up straight, like the ears of all wild Canidae. Some of the more advanced of the canine races—like the sheep-dogs, pointers, and St. Bernards—are animals of great sympathy and sensibility. When educated, these dogs are almost human in their impulses and in their powers of discernment. In patience, vigilance, and devotion to duty, they are superior to many men. At a word, or even a look, from its master, the loyal collie will gather the sheep scattered for miles around to the place designated, and do it with such tact and expedition as to command admiration. It has been said that if it were not for this faithful and competent canine the highlands of Scotland would be almost useless for sheep-raising purposes, because of the greater expense that would be entailed if men were employed. One collie will do the work of several men, and will do it better, and the generous-hearted creature pours out its services like water. It requires no compensation except table refuse and a straw bed. In South America sheep-dogs are trained to act as shepherds and assume the whole responsibility of tending the flock. ‘It is a common thing,’ says Darwin, ‘to meet a large flock of sheep guarded by one or two dogs, at a distance of some miles from any house or man.’ When the dogs get hungry, they come home for food, but immediately return to the flock on being fed. ‘It is amusing,’ remarks this writer, ‘to observe, when approaching a flock, how the dog immediately advances barking, while the sheep all close in his rear as around the oldest ram.’ Romanes relates an incident which well illustrates the high character and intelligence of the dog and its wonderful devotion to a trust. ‘It was a Scotch collie. Her master was in the habit of consigning sheep to her charge without supervision. On this particular occasion he remained behind or proceeded by another road. On arriving at home late in the evening, he was astonished to learn that his faithful animal had not made her appearance with the drove. He immediately set out in search of her. But on going out into the streets, there she was coming with the drove, not one missing, and, marvellous to relate, she was carrying a young puppy in her mouth. She had been taken in travail on the hills, and how the poor creature had contrived to manage her drove in her condition is beyond human calculation, for her road lay through sheep all the way. Her master’s heart smote him when he saw what she had suffered and effected. But she was nothing daunted, and after depositing her young one in a place of safety she again set out full speed for the hills, and brought another and another, till she brought the whole litter, one by one; but the last one was dead’.^[1a]

What a wonderful transformation in canine character! The very beings whose blood the dog once drank with ravenous thirst it now protects with courage and fidelity. And this transformation in character is not due to education simply. It is innate. Young dogs brought from Tierra del Fuego or Australia, where the natives do not keep such domestic animals as sheep, pigs, and poultry, invariably have an incurable propensity for attacking these animals.

The feeling of ownership possessed by so many dogs is an entirely new element in canine character, a trait implanted wholly by human selection. Bold and confident on his own premises, the dog immediately becomes weak and apologetic when placed in circumstances in which he feels he has no rights.

The pointers and setters have been developed as distinct breeds by human selection during the past 150 or 200 years.

What is true of the dog is true also, to a large extent, of the cat, cow, horse, sheep, goat, fowl, and other domestic animals. Serene and peaceful puss is the tranquillised descendant of the wild cat of Egypt, one of the most untamable of all animals. The migratory instinct, so strong in wild water-fowl, is almost absent from our geese and ducks, as is the fighting propensity (prominent in the Indian jungle-bird) from most varieties of the domesticated chicken. There are now as many as a hundred different kinds of domesticated animals, and there is scarcely one of these animals that has not been profoundly changed in character during the period of its domestication. There are much greater changes in some races than in others. Some races have been much longer in captivity than others. And then, too, there is great difference in the degree of plasticity in different races, the races of ancient origin being much more fixed in their psychology than those of more recent beginnings. In some races, too—as in the sheep—the selections made by man have been made primarily with reference to certain physical qualities, and in these cases the mental qualities have been only incidentally affected. In Polynesia, where it is selected for its flavour instead of for its fleetness or intelligence, the dog is said to be a very stupid animal. But in most cases of domestication the changes wrought by selection in the mental make-up of the race have been fully as great as the changes in body, and in some instances much greater. And the process by which these great changes in psychology have been effected is in principle identically the same as that by which mental evolution in general is assumed to have been brought about.

History everywhere has come out of the night, out of the deep gloom of the unrecorded. But it has not leaped forth like lightning out of the darkness. It has dawned, night being succeeded by the amorphous shadows of legend and tradition, and these in turn by the attested events of true history. Almost every civilised people can trace back its genealogy to a time when it was represented on the earth by one or more tribes of savage or half-savage ancestors. The Anglo-Saxons go back to the Angles, Saxons, and Jutes, three semi-savage tribes who came to England from the borderlands of the Baltic fourteen or fifteen centuries ago. The French are the descendants of the Gauls, who formed the scattered population of warring and superstitious tribes referred to by Julius Caesar in the opening lines of his ‘Commentaries.’ The blue-eyed Germans came from the Cimbri, the Goths, and the Vandals, those bold, wild hordes who charged out of the north to battle with the power of Rome. And all of the Aryan races—English, German, Italian, Scandinavian, Russian, Roman, Greek, and Persian—trace their ancestry back, by means of common languages and legends, to a time when they were wandering tribes of nomads tenting somewhere on the plains of transcaspian Asia.

6. The evolution of mind in the animal world in general is suggested by the fact that mind in man has evolved. The rich, luminous intellect of civilised man, with its art, science, law, literature, government, and morality, has been evolved from the rude, raw, demon-haunted mind of the savage. Evidence of this evolution is furnished by the recorded facts of human history, by the antiquarian collections of our museums, and by a study of existing savages.

In all our museums there are collections of the relics of prehistoric peoples. These collections consist of objects upon which men in distant ages of the world have wrought—their weapons, ornaments, utensils, implements, and playthings—which have been saved from the teeth of Time by their durability. The character of the minds which operated on these objects, which produced and used them, may be inferred from the character of the objects, just as the life and surroundings of an ancient animal or plant may be inferred from its fossil. These relics are of stone, bone, bronze, and iron. They are found in almost every region of the earth—all over Europe and its islands, in western and central Asia, in China and Japan, in Malay, Australia, and New Zealand, in the islands of the Pacific, and throughout the length and breadth of America. They antedate human history by thousands of years. They are the ruins of the Stone Age, the Bronze Age, and the Iron Age of mankind. In all of these remains there is evidence of a slow but gradual improvement as we approach the present. There are places on the earth where the evolution of human implements, from the rudest chipped stones to the comparatively finished products of historic peoples, is epitomised in the deposits of a few feet in depth. One of these occurs at Chelles, a suburb of Paris, and was made the subject of a paper by Professor Packard in the Popular Science Monthly for May, 1902. Here three distinct layers, containing human remains entirely different in character from each other, appear within a depth of 30 feet from the surface. The lowest bed, a layer of pebbles and sand, and probably preglacial in origin, contains the famous Chellean ‘axes,’ rude almond-shaped implements of chipped flint, and used by these ancient inhabitants by being held in the hand. In this bed are also found the bones of the straight-tusked elephant, cave-bear, big-nosed rhinoceros, and other species now extinct. The next bed is the interglacial, and contains implements entirely different from the one below it, among which are skin-scrapers and lance-points. The animal remains of this bed are also different from those found in the bed below, and include animals like the musk-ox and the reindeer, which were probably driven to this southern clime from more northern regions by the excessive cold of the time. The third bed, which lies just below the surface soils, contains polished stone axes and other remains of human industry cotemporaneous with the Swiss lake-dwellers. From the swamps and loams are sometimes dug up the remains of Gallo-Roman civilisations—Gallic coins, serpentine axes, and bronzes of the time of the Antonines.

No one can fully realise the vast advance that has been made by the human mind until he has looked upon a savage—has seen the savage in his native haunts attacking the problems of his daily life, and has tasted of his philosophy and disposition. The savage is the ancestor of all higher men. When we look upon the savage, we look upon the infancy of the human world. All of the laws, languages, sciences, governments, religions, and philosophies of civilised man, or nearly all of them at any rate, are the exfoliated laws, languages, sciences, governments, religions, and philosophies of savages. It is impossible to understand the laws of civilised societies without a knowledge of the laws of savage societies. The same thing is true of government, religion, and philosophy—and of human nature itself. Human nature as exhibited by civilised men and women—I mean men and women with a veneering of civility, not really civilised folks, for there are none of them on the earth—is a perpetual enigma unless it is illumined by retrospection, by a comparative study of human nature, by a study of human nature as seen in more and more primitive men and women. The mind of the savage, as compared with that of civilised man, is exceedingly primitive. The picture drawn by Gilbraith of the North American Sioux is a typical picture of savage life and character. Gilbraith lived among these tribes for several years, and was thoroughly acquainted with them. He says:

‘They are bigoted, barbarous, and exceedingly superstitious. They regard most of the vices as virtues. Theft, arson, rape, and murder are regarded by them as the means of distinction. The young Indian is taught from childhood to regard killing as the highest of virtues. In their dances and at their feasts, the warriors recite their deeds of theft, pillage, and slaughter as precious things; and the highest, indeed the only, ambition of the young brave is to secure “the feather,” which is but the record of his having murdered, or participated in the murder of, some human being—whether man, woman, or child, it is immaterial’.^[2]

‘Conscience,’ says Burton, ‘does not exist in East Africa, and “repentance” simply expresses regret for missed opportunities for crime. Robbery makes an honorable man; and murder, the more atrocious the crime the better, makes the hero’.‘Conscience,’ says Burton, ‘does not exist in East Africa, and “repentance” simply expresses regret for missed opportunities for crime. Robbery makes an honorable man; and murder, the more atrocious the crime the better, makes the hero’.^[3]

Many things appear natural and self-evident to the savage which seem to us actually revolting. When the Fuegians are hard pressed by want, they kill their old women for food rather than their dogs, saying: ‘Old women no use; dogs kill otters.’ ‘What I’ said a negro to Burton, ‘am I to starve while my sister has children whom she can sell?’

Lubbock, in his great work on ‘The Origin of Civilisation,’ cites hundreds of instances of savage rudeness and simplicity which seem almost incredible to one accustomed all his life to types of human character such as are found in Europe and America. For instance, ‘when the natives of the Lower Murray first saw pack-oxen, some of them were frightened and took them for demons with spears on their heads, while others thought they were the wives of the settlers, because they carried the baggage.’ Speaking of the wild men in the interior of Borneo, this writer says: ‘They live absolutely in a state of nature, neither cultivating the ground nor living in huts. They eat neither rice nor salt, and do not associate with each other, but rove about the woods like wild beasts. The sexes meet in the jungle. When the children are old enough to shift for themselves, they usually separate, neither one afterwards thinking of the other. At night they sleep under some large tree whose branches hang low. They fasten the children to the branches in a kind of swing, and build a fire around the tree to protect them from snakes and wild beasts. The poor creatures are looked on and treated by the other Dyaks as wild beasts.’ Lubbock sums up his conclusions on the morality of savages in the following pathetic acknowledgment: ‘I do not remember a single instance in which a savage is recorded as having shown any symptoms of remorse; and almost the only case I can call to mind in which a man belonging to one of the lower races has accounted for an act by saying explicitly that it was right, was when Mr. Hunt asked a young Figian why he had killed his mother’.^[4a]

A few pages further on, the same author adds, regarding the deplorable state of morality among savages: ‘That there should be races of men so deficient in moral feeling was altogether opposed to the preconceived ideas with which I commenced the study of savage life, and I have arrived at the conviction by slow degrees, and even with reluctance. I have, however, been forced to this conclusion, not only by the direct statements of travellers, but also by the general tenor of their remarks, and especially by the remarkable absence of repentance and remorse among the lowest races of men.’ Among ourselves the words used to distinguish right and wrong are metaphors. Right originally meant ‘straight,’ and wrong meant ‘twisted.’ Language existed, therefore, before morality; for if moral ideas had preceded language, there would have been original words to stand for them. Religion, according to Lubbock, has no moral aspect or influence except among the more advanced races of men. ‘The deities of savages are evil, not good; they may be forced into compliance with the wishes of man; they generally delight in bloody, and often require human, sacrifices; they are mortal, not immortal; they are to be approached by dances rather than by prayers; and often approve what we call vice rather than what we esteem as virtue. In fact, the so-called religion of the lower races of mankind bears somewhat the same relation to religion in its higher forms as astrology does to astronomy or alchemy to chemistry’.^[4b]

Savages have few general ideas of any kind, as is evidenced by the almost total absence among them of words denoting general ideas. Many savage races cannot comprehend numbers greater than five or six, and are unable to make the simplest mathematical computations without using the fingers. The languages of savages are extremely rude, words being freely pieced out with pantomime. Savages talk with difficulty in the dark, because of their great reliance on gesture in conversation. The rich vocabularies of the languages of Europe and America have grown up step by step with the evolution of European and American mind. Every language is an evolution. The languages of many primitive peoples lack the verb to be entirely, and all nouns are proper nouns. Words are often little more than grunts or clucks, and are without the euphony and articulation found in the languages of the civilised. Darwin says that the language of the Fuegians sounds like a man clearing his throat. Not only every language, but every word, both in its form and meaning, is in process of evolution. Spirit, for instance, originally meant ‘blowing,’ understanding meant ‘getting beneath,’ and development the physical act of ‘unfolding.’ Words are continually drifting from their original meanings under the stress of incessant use, as ships drag their anchors in a gale. Those words that are exposed to common use undergo the most rapid changes, while words sheltered from the rush of human affairs, like harboured ships, hold to their moorings forever. Let, for instance, once meant ‘hinder’; now it means ‘allow.’ Bisect, on the other hand, a word of rare and technical use, has remained unaltered in significance for twenty centuries.

Even our alphabet has been evolved. The twenty-six symbols composing it have been eroded into the peculiar forms in which they appear at present by the various peoples through whose hands they have come to us. The originals were pictographs such as are still found on the aged monuments of earth’s earliest civilisations. The English got their alphabet from the Romans, who obtained it, along with almost everything else they had, from the Greeks. The Greeks received it from the Phenicians, and the Phenicians from the papyrus writers of Egypt, who in turn procured it from those hieroglyph chiselers who carved their curious literature on the granite tombs of the Nile in the remotest dawn of human history. A, the first letter of our alphabet, is a figure which has been evolved, as the result of long wear and tear, from the picture of an eagle; B was originally the picture of a crane; C represents a throne; D a hand; F an asp; H a sieve; K a bowl; L a lioness; M an owl; N a water-line; R a mouth; S a garden; T a lasso; X a chairback; and Z a duck.

The psychology of civilised man, though derived from that of the savage, and hence resembling it fundamentally, is, nevertheless, very different from it, both in character and in what it contains. The mind of the savage is rude, unresourceful, vicious, and childlike, while that of the civilised man or woman may be overflowing with wisdom and benignity. This gulf has not been covered by a stride, but by the slow operation of the same laws of Inheritance, Variation, and Selection by which all progress has been brought about.

7. Degeneration is a necessary part of the process of organic evolution. All progress, whether anatomical, intellectual, or social, takes place through selection, and selection means the pining and ultimate passing away of that which is left. In individual evolution it is organs, ideas, and traits of character that are eliminated, and in social evolution it is customs and institutions. One of the reasons given in the preceding chapter for the belief in the evolution of structures is the existence in man and other animals of vestigial organs, organs which in lower forms of life are useful, but which in higher forms are represented by useless or even injurious remnants. Similar remnants are found in the psychology of man and other animals. These vestiges of mind are not so easily recognised as the vestiges of structure, but they are everywhere. We find them in the antiquated instincts of man and the domestic animals, in the silent letters and worn-out words of languages, and in the emaciated remains of abandoned beliefs and institutions.

The hunting and fishing instinct of civilised man is a vestigial instinct, normal in the savage, but without either sense or decency among men devoted to industrial pursuits. The savage hunts and fishes because he is hungry, never for pastime; civilised men and women do so because they are too mechanical to assort their impulses. Civilised man is a mongrel, a cross between a barbarian and a god. His psychology is a compound of the jungle and the sky. In their loftier moments, many men are able to obscure the cruder facts of their origin and to put into temporary operation those more splendid processes of mind which characterise their ideals. But even the most civilised are forever haunted by the returning ghosts of departed propensities—propensities which grew up in ages of hate, which are now out-of-date, but which in the trying tedium of daily life come back and usurp the high places in human nature. Revenge, hate, cruelty, pugnacity, selfishness, vanity, and the like, are all more or less vestigial among men who have entered seriously on the life of altruism. Like the vermiform appendix and the human tail, these old obsolete parts of the human mind are destined, in the ripening of the ages, to waste away and disappear through disuse.

The practice of the dog of turning round two or three times before lying down is in response to an instinct which was no doubt beneficial to it in its wild life, when it was wont to make its bed in the grasses, but which is now a pure waste of time. Darwin records it as a fact, that he has himself seen a simple-minded dog turn round twenty times before lying down. The sheep-killing mania, which sometimes comes over dogs when three or four of them get together and become actuated by the ‘mob’ spirit, is a vestige of the old instinct of the carnivore which centuries of domestication have not yet quite erased. Goodness, if too prolonged, becomes irksome to dogs for the same reason that it does to men. Dogs have come from savages just as men have, and, while the civilised nature of the dog is more constitutional than that of civilised man, the old deposed instincts mount to the throne once in awhile, and the faithful collie is for the time being a wolf again. The instinct of domestic sheep to imitate their leader in leaping over obstacles is another probable survival of wild life. If a bar or other obstacle be placed where the leader of a flock of sheep is compelled to leap over it, and the obstacle is then removed, the entire band of followers will leap at the same place regardless of the fact that the obstruction is no longer there. No other animals do this. The instinct is probably a survival of wild life, when these animals, pursued by their enemies over chasms and precipices, were compelled to imitate in the flight those in front of them in order to live. Darwin thinks the donkey shows its aboriginal desert nature in its aversion for crossing the smallest stream, and its relish for rolling in the dust. The same aversion for everything aquatic exists also in the camel. Quails kept in captivity, I am told, persist in scratching at the pan when they are feeding, just as they would need to do, and were accustomed to do, among the leaves and grasses of the groves. The restlessness of cage-birds and domestic fowls at migrating time, the mimic dipping and sporting of ducks when confined to a terrestrial habitat, the grave marshalling of geese by the chief gander of the band, the ferocity of cows, ewes, and the females of other domestic animals during the first few days of motherhood, the hunting instinct of dogs kept as shepherds and pets, the squatting of young pigs when suddenly alarmed—all of these are vestigial instincts, functional in the wild state, but now useless and absurd.

The silent letters and superannuated words and phrases found everywhere in literature are the vestigial parts of language. Every silent letter was originally sounded, and every obsolete word was at one time used. In the French word, temps, for instance, which means ‘time,’ neither the p nor the s is sounded. But in the Latin word tempus, from which the French word is derived, all of the letters are sounded.

Man has been defined as a creature of habit. As he has done a thing once, or as his ancestors have done a thing, so he does it again. By precept and example he transmits to each new generation the customs, beliefs, and points of view which he has invented. Social changes take place with extreme moderation. The drowsy ages take plenty of time to get anywhere. Civilisation is lazy, deliberate, unimpassioned. It loafs and hesitates. It holds on to the past. Living civilisations always drag behind them a trail of traditions from dead civilisations. Religions and philosophies change, and creeds and governments flow into strange and undreamed-of forms; but their personalities survive, their souls live on, their remnants, transmitted as traditions from generation to generation, defy the meddlings of innovators. Hence in every society there are forms and ceremonies, laws and customs, games and symbols, etc., which have been completely diverted from their original purposes, or which have become so reduced in importance as to be of no use. Spencer has shown that the forms of salutation in vogue among civilised societies are the vestiges of primitive ceremonial used to denote submission. The May Day festivals with which the opening spring is usually hailed are the much-modified survivals of pagan festivals in honour of plant and animal fecundity. Superstition and folklore are vestigial opinions. The gorgeous Easter egg is a survival of a dawn myth older than the Pyramids, and our Christmas dinner is a reminiscence of a cannibal carnival celebrating the turning back of the sun at the winter solstice (Brinton). In the English government, where democracy has in recent centuries made such inroads on the monarchy, there are numerous examples of vestigial institutions—institutions which continue to exist purely because they have existed in the past, but which were functional a few centuries ago. The supreme office itself is one of these. The King represents the petered-out tail-end of a privilege which in the time of the early Stuarts was almost unlimited. Similar vestiges exist in the United States, where the national spirit during the last century and a half has so completely wiped out colonialism. Such are the Town Meetings of Boston and of New Haven. The earliest form of human marriage was marriage by capture. The man stole the woman and carried her away by force. This form of marriage was in the course of evolution succeeded by marriage through purchase. A man anxious to become a husband could do so by paying to the father a stipulated amount of cash or cattle for his daughter. This second form of marriage finally evolved into marriage arranged by direct and peaceful negotiation between the prospective husband and wife. This is the form most commonly employed at the present time among the more advanced societies of men. But in the ceremonies which surround the nuptial event among civilised peoples survive vestiges of many of the facts associated with aboriginal marriages. A marriage in high life is a sort of epitome of the evolution of the institution. The coyness and hesitancy of the woman in accepting the offers of her proposed spouse are the lineal descendants of the original reluctance of her savage sisters. The wedding-ring is the old token accepted by the woman when she gave her pledge of bondage. The coming of the groom with his aids to the marriage is a figurative marauding expedition. The honeymoon is the abduction. And the charivari and missile-throwing indulged in by friends and relatives on the departure of the wedded twain is a good-humoured counterfeit of the armed protest made by relatives of old when a bride-snatcher came among them.^[5]

The vestiges found everywhere in the mental and social phenomena of man and other animals have arisen as necessary facts in the process of mental evolution. They are the vermiform appendices of the mind.

8. One of the strongest reasons for a belief in the physical evolution of animal species is that furnished by individual evolution. Each individual animal recapitulates in a wonderful manner the phylogenesis of its species. Now, it is extremely significant that a similar parallel exists in the case of mental evolution. Each individual mind ascends through a series of mental faculties which epitomises in a remarkable manner the psychogenesis of the animal kingdom.

The human child is not born with a full-grown mind any more than with a full-grown body. It grows. It exfoliates. It ripens with the years. It begins in infancy at the zero-point, and in manhood or womanhood may blaze with genius and philanthropy.

But the mind of the child not only unfolds: it unfolds in a certain order, the more complex parts and the more civilised emotions invariably appearing last. The initial powers of the newborn babe are those of sensation and perception. The babe cannot think. It has no feeling of fear, no affection, no sympathy, and no shame. It can see, and hear, and taste, and feel pain and satisfaction—and these are about all. Even these are vague and confused. In a week the perceptions are more sharp and vivid, more distinct and orderly. Memory arises. Memory is the power of reproducing past impressions. At three weeks the emotions begin to sprout. The first to make their appearance are fear and surprise. When the babe is seven weeks old the social affections show themselves, and the simplest acts of association are performed. At the age of twelve weeks jealousy and anger may be expected, together with simple exhibitions of association by similarity. At fourteen weeks affection and reason dawn. Sympathy germinates at about the age of five months; pride and resentment germinate at eight months; grief, hate, and benevolence at ten months; and shame and remorse at fifteen months.

Now, the remarkable thing about this is that this is the order, or very much like the order, in which mind in the animal kingdom as a whole has apparently evolved. The lower orders of animal life have none of the higher emotions and none of the more complicated processes of mind. There is no shame in the reptile, no dissimulation in the fish, no sympathy in the mollusk, and no memory in the sponge. Memory dawns in the echinoderms, or somewhere near the radiate stage of development, and fear and surprise in the worms. Pugnacity makes its appearance in the insects, imagination in the spiders, and jealousy in the fishes. Pride, emulation, and resentment originate in the birds: grief and hate in the carnivora; shame and remorse among dogs and monkeys; and superstition in the savage.^[1b]

It is also an important fact bearing on the general problem of evolution, that the civilised child, from about the age of one on, is a sort of synopsis, rude but unmistakable, of the historic evolution of the human race. The child is a savage. It has the emotions of the savage, the savage’s conceptions of the world, and the desires, pastimes, and ambitions of the savage. It hates work, and takes delight in hunting, fishing, fighting, and loafing, like other savages. The hero of the child is the bully, just as the demigod of primitive man is a blood-letting Caesar or Achilles. The children of the civilised are savages—some more so than others—and if they ever become civilised—some do, and some do not—they do so through a process of rectification and selection similar to that through which the Aryan races have passed during the ages of human history.

There is a similar evolution in the young of other animals, especially of the higher animals. Each individual begins in a perfectly mindless form, and grows mentally as it develops physically. The young puppy has a very different thinking and feeling apparatus from the grown-up mastiff. It is controlled almost exclusively by sense and instinct. It is devoid of common-sense, and divides its time impartially between play and sleep. It is easily frightened, and cries at every little thing. It has the rollicking, awkward, irresponsible personality of a boy of six. About the same thing is true of kittens, colts, calves, bear cubs, the whelps of wolves, and other young quadrupeds. A kitten will chase shadows, try to catch flies crawling on the other side of a windowpane, sit and watch in wonder the moving objects about it, and do many other things which it never thinks of doing when it has grown to be a wise and sophisticated puss trained in the ways of the world about it. Doghood, cathood, and horsehood, like manhood and womanhood, are the ripened products of long processes of growth and exfoliation.

The parallel is, of course, imperfect. There are many abbreviations, many breaks and ambiguities, in the summary presented by the individual mind of the evolution of the race. And, in the present state of psychogeny, only the barest outline can be traced. But enough is known to render the fact unquestionable.

9. If human mind has been evolved, it is logical to expect to find in other animals, especially in those more closely resembling ourselves in structure, mind elements similar to those we find in ourselves.^[6] And this is precisely what we do find. The same great trunk impulses that animate men animate also those more rudimentary but not less real individuals below and around men. The great primary facts of sex, of self-preservation, of pleasure and pain, of life and death, of egoism and altruism, of motherhood, of alimentation, etc.—all of these are found everywhere, down almost to the very threshold of organic life. And they are the antecedents of the same great tendencies as those that control the lives of men. It is often supposed by the superficial that the facts of sex and alimentation, which are so prominent in other animals, have been relegated to a very subordinate place in the nature of man. But nothing could be much farther from the truth. It has been said that there are only two things that will induce the typical African or Australian to undergo prolonged labour—hunger and the sex appetite. It is probable that men—not only primitive men, but the most evolved races, including even poets and philosophers—will do more desperate and idiotic things and undergo more trying experiences when actuated by the sex impulse than from the effects of any other impulse in human nature. This impulse is especially overmastering in races like the Italian and Spanish, and has been mentioned by ethnologists as a probable factor in the deterioration of these races. The sentiments of love, marital affection, and family life control mankind more completely than any other motives. And next to these comes hunger. Let anyone who imagines that only the non-human creatures are carnal observe with what uniformity almost every function in both savage and civilised life gravitates toward eating and drinking. If it is a picnic, a convention, a national holiday, a Christmas celebration, a meeting of a fraternal society, a thanksgiving ceremony, or what not, eating is one of the main things, and the one exercise into which four-fifths of those present probably enter with the greatest enthusiasm.

The human soul is the blossom, not the beginning, of psychic evolution. Mother-love compassionated infancy long before a babe came from the stricken loins of woman. The inhabitants of the earth had been seeking pleasure and seeking to avoid pain, and seeking ever with the same sad futility, long before man with his retinue of puny philosophies strutted upon the scene. Hate poisoned the cisterns of the sea and dropped its pollutions through the steaming spaces ages before there was malice among men. Altruism is older than the mountains, and selfishness hardened the living heart before the continents were lifted. There was wonder in the woods and in the wild heart of the fastnesses before there were waitings in synagogues and genuflections about altar piles. The frogs, crickets, and birds had been singing love a thousand generations and more when the first amoroso knelt in dulcet descant to a beribboned Venus. Human nature is not an article of divine manufacture, any more than is the human form. It came out of the breast of the bird, out of the soul of the quadruped. The human heart does not draw back from the mysterious dissolutions of death more earnestly than does the hare that flees before resounding packs or the wild-fowl that reddens the reeds with its flounderings. Bowerbirds build their nest-side resorts, decorate them with gay feathers, and surround them with grounds ornamented with bright stones and shells, for identically the same reason as human beings design drawing-rooms, hang them with tapestries, and surround them with ornamented lawns. The scarlet waistcoat of the robin and the flaming dresses of tanagers and humming-birds, which seem, as they flash through the forest aisles, like shafts of cardinal-fire, serve the same vanities and minister to the same instincts as the plumage of the dandy and the tints and gewgaws of gorgeous dames. Art is largely a manifestation of sex, and it is about as old and about as persistent as this venerable impulse. How did Darwin’s dog know his master on his master’s return from a five-years’ trip around the world? Just as the boy remembers where the strawberries grow and the philosopher recalls his facts—by that power of the brain to retain and to reproduce past impressions. Why does the thinker search his soul for new theories and the spaces for new stars? For the same reason that the child asks questions and the monkey picks to pieces its toys. What is reason? A habit of wise men—an expedient of ants—a mania the fools of all ages are free from. All of the activities of men, however imposing or peculiar, are but elaborations in one way or another of the humble doings of the animalcule, whose home is a water-drop and whose existence can be discovered by human senses only by the aid of instruments.

10. Mind has evolved because the universe has evolved. Whether mind is a part of the universe, or all of it, or only an attribute of it, it is, in any case, inextricably mixed up with it. And, since the universe as a whole has evolved, it is improbable that any part of it or anything pertaining to it has remained impassive to the general tendency. There are no solids. Nothing stands. The whole universe is in a state of fluidity. Even the ‘eternal hills,’ the ‘unchanging continents,’ and the ‘everlasting stars,’ are flowing, flowing ever, slowly but ceaselessly, from form to form. So is mind. Indeed, if there is anywhere in the folds of creation a being such as the one whom man has long accused of having brought the universe into existence, we may rest assured that even he is not sitting passively apart from the enormous enterprise which he has himself inaugurated.

The evidence is conclusive. The evolution of mind is supported by a series of facts not less incontrovertible and convincing than that by which physical evolution is established. The data of mental evolution are not quite so definite and plentiful as those of physical evolution. But this is due to the greater intangibility of mental phenomena and to the backward condition of the psychological sciences, especially of comparative psychology. Mental phenomena are always more difficult to deal with than material phenomena, and hence are always more tardily attended to in the application of any theory. But taking everything into account, including the close connection between physical and psychical phenomena, it may be asserted that it is not more certain that the physical structure of man has been derived from sub-human forms of life than it is that the human mind has also been similarly derived.

Man is the adult of long evolution. The human soul has ancestors and consanguinities just as the body has. It is just as reasonable to suppose that the human physiology, with its definitely elaborated tissues, organs, and systems, is unrelated to the physiology of vertebrates in general, and through vertebrate physiology to the physiology of invertebrates, as to suppose that the states and impulses constituting human nature and consciousness began to exist in the anthropic type of anatomy and are unrelated to the states and impulses of vertebrate consciousness in general, and through vertebrate consciousness to those remoter types of sentiency lying away at the threshold of organic life. Human psychology is a part of universal psychology. It has been evolved. It has been evolved according to the same laws of heredity and adaptation as have physiological structures. And it is just as impossible to understand human nature and psychology unaided by those wider prospects of universal psychology as it is to understand the facts of human physiology unaided by analogous universalisations.

[1a.] [1b.] Romanes: Mental Evolution in Animals; New York, 1898.
[2.] Gilbraith: Ethnological Journal, 1869, p. 304.
[3.] Burton: First Footsteps in East Africa; London, 1856.
[4a.] [4b.] Lubbock: Origin of Civilisation; New York, 1898.
[5.] Demoor: Evolution by Atrophy; New York, 1899.
[6.] This topic is more fully presented in the chapter “The elements of the human and non-human mind compared.”

III. The Common-sense View.

But it is not necessary to be learned in Darwinian science in order to know that non-human beings have souls. Just the ordinary observation of them in their daily lives about us—in their comings and goings and doings—is sufficient to convince any person of discernment that they are beings with joys and sorrows, desires and capabilities, similar to our own. No human being with a conscientious desire to learn the truth can associate intimately day after day with these people—associate with them as he himself would desire to be associated with in order to be interpreted, without presumption or reserve, in a kind, honest, straightforward, magnanimous manner; make them his friends and really enter into their inmost lives—without realising that they are almost unknown by human beings, that they are constantly and criminally misunderstood, and that they are in reality beings actuated by substantially the same impulses and terrorised by approximately the same experiences as we ourselves. They eat and sleep, seek pleasure and try to avoid pain, cling valorously to life, experience health and disease, get seasick, suffer hunger and thirst, co-operate with each other, build homes, reproduce themselves, love and provide for their children, feeding, defending, and educating them, contend against enemies, contract habits, remember and forget, learn from experience, have friends and favourites and pastimes, appreciate kindness, commit crimes, dream dreams, cry out in distress, are affected by alcohol, opium, strychnine, and other drugs, see, hear, smell, taste, and feel, are industrious, provident and cleanly, have languages, risk their lives for others, manifest ingenuity, individuality, fidelity, affection, gratitude, heroism, sorrow, sexuality, self-control, fear, love, hate, pride, suspicion, jealousy, joy, reason, resentment, selfishness, curiosity, memory, imagination, remorse—all of these things, and scores of others, the same as human beings do.

The anthropoid races have the same emotions and the same ways of expressing those emotions as human beings have. They laugh in joy, whine in distress, shed tears, pout and apologise, and get angry when they are laughed at. They protrude their lips when sulky or pouting, stare with wide open eyes in astonishment, and look downcast when melancholy or insulted. When they laugh, they draw back the corners of their mouth and expose their teeth, their eyes sparkle, their lower eyelids wrinkle, and they utter chuckling sounds, just as human beings do.^[1] They have strong sympathy for their sick and wounded, and manifest toward their friends, and especially toward the members of their own family, a devotion scarcely equalled among the lowest races of mankind. They use rude tools, such as clubs and sticks, and resort to cunning and deliberation to accomplish their ends. The orang, when pursued, will throw sticks at his pursuers, and when wounded, and the wound does not prove instantly fatal, will sometimes press his hand upon the wound or apply grass and leaves to stop the flow of blood. The children of anthropoids wrestle with each other, and chase and throw each other, just as do the juveniles of human households. The gorilla, chimpanzee, and orang all build for themselves lodges made of broken boughs and leaves in which to sleep at night. These lodges, rude though they are, are not inferior to the habitations of many primitive men. The Puris, who live naked in the depths of the Brazilian forests, do not even have huts to live in, only screens made by setting up huge palm-leaves against a cross-pole.^[2] Some of the African tribes are said to live largely in caves and the crevices of rocks. This is the case with many primitive men. According to a writer in the Journal of the Anthropological Institute of Great Britain and Ireland (January, 1902), ‘common forms of dwelling among the wild tribes of the Malay Peninsula are rock-shelters (sometimes caves, but more commonly natural recesses under overhanging ledges) and leaf-shelters, which are sometimes formed on the ground and sometimes in the branches of trees. The simplest form of these leaf-shelters consists of a single palm-leaf planted in the ground to afford the wanderer some slight shelter for the night.’

When they sleep, the anthropoids sometimes lie stretched out, man-like, on their backs, and sometimes they lie on their side with their hand under their head for a pillow. The orang retires about five or six o’clock in the evening, and does not rise until the morning sun has dissipated the mists of the forest. The gorilla and chimpanzee seem to mate for life. The former lives, as a rule, in single families, each family consisting of a male and a female and their children. During the day this primitive family roams through the forests of equatorial Africa in search of food. They live on fruits and nuts and the tender shoots and leaves of plants. They are especially fond of sugar-cane, which they eat in small-boy fashion by chewing and discarding the juiceless pulp. Among the foods of the gorilla is a walnut-like nut which it cracks with stones. As evening comes on, the head of the family selects a sleeping-place for the night. This is usually some low tree with a dense growth at the top, and protected as much as possible by higher trees from the chilly night wind. Here, on a bed of broken branches and leaves, the mother and little ones go to sleep, while the father devotedly crouches at the foot of the tree, with his back against the trunk to guard his family from leopards and other nocturnal cut-throats who eat apes.^[3a] When the weather is stormy, they cover themselves with broad pandanus leaves to keep off the rain. Koppenfels relates an incident of a gorilla family which makes one think of things he sometimes sees among men. The family consisted of the parents and two children. It was meal-time. The head of the family reposed majestically on the ground, while the wife and children hustled for fruits for him in a near-by tree. If they were not sufficiently nimble about it, or if they were so wanton as to take a bite themselves, the paterfamilias growled and gave them a cuff on the head.^[3b] Notwithstanding the sensational tales of the ferocity of this being, the gorilla never attacks anyone at any time unless he is molested.^[3c] He much prefers to attend to his own business. But if he is not allowed to do so, if he is attacked, he is as fearless as a machine. He approaches his antagonist walking upright and beating his breast with his fists. He presents one of the most terrifying of all spectacles, as, with gleaming eyes, hair erect, and resounding yells, he bears down on the object of his resentment. The natives fear the gorilla more than they fear any other animal.

The chimpanzee in his native wilds lives in small tribes consisting of a few families each. Like the gorilla, it passes the most of its time on the ground, going among the trees only for food or sleep. It builds a sleeping-place at night in the trees, as in the case of the gorilla. Brehm, who brought up a number of chimpanzees in his own home as comrades and playmates of his children, and who studied them and associated with them for years, says: ‘The chimpanzee is not only one of the cleverest of all creatures, but a being capable of deliberation and judgment. Everything he does is done consciously and deliberately. He looks upon all other animals, except man, as very inferior to himself. He treats children entirely different from grown-up people. The latter he respects; the former he looks upon as comrades and equals. He is not merely inquisitive: he is greedy for knowledge. He can draw conclusions, can reason from one thing to another, and apply the results of experience to new circumstances. He is cunning, even wily, has flashes of humour, indulges in practical jokes, manifests moods, and is entertained in one company and bored in another. He is self-willed but not stubborn, good-natured but not wanting in independence. He expresses his emotions like a human being. In sickness he behaves like one in despair, distorts his face, groans, stamps, and tears his hair. He learns very easily whatever is taught him, as, for instance, to sit upright at table, to eat with knife and fork and spoon, to drink from a glass or cup, to stir the sugar in his tea, to use a napkin, to wear clothes, to sleep in a bed, and so on. Exceedingly appreciative of every caress, he is equally sensitive to blame and unkindness. He is capable of deep gratitude, and he expresses it by shaking hands or kissing without being asked to do so. He behaves toward infants with touching tenderness. The behaviour of a sick and suffering chimpanzee is most pathetic. Begging piteously, almost humanly, he looks into his master’s face, receives every attempt to help him with warm thanks, and soon looks upon his physician as a benefactor, holding out his arm to him, stretching out his tongue whenever told, and even doing so of his own accord after a few visits from his physician. He swallows medicines readily, and even submits to surgical operations—in short, behaves very like a human patient in similar circumstances. As his end approaches, he becomes more gentle, and the nobler traits of his character stand out prominently’.^[4a]

The New York Herald, in its issue of July 2, 1901, contained an account of the death of Charlemagne, a chimpanzee who died a short time before at Grenoble, France. This anthropoid at the time of his death was the most popular inhabitant of the town. His popularity was due to his good-nature and intelligence, and especially to the fact that a few years before his death he had saved a child from drowning in a well. The ape saw the child fall, and without a moment’s hesitation climbed down the rope used for the buckets, seized the child, and climbed out again by the same rope by which he had descended. The people of the town thought so much of him that they followed his remains to the grave, and the municipal council voted to erect a bronze statue to his memory.

A heartless hunter—maybe one of those assassins who fill the wilds with widows and orphans in the name of Science—tells of the murder of a mother chimpanzee and her baby in Africa. The mother was high up in a tree with her little one in her arms. She watched intently, and with signs of the greatest anxiety, the hunter as he moved about beneath, and when he took aim at her the poor doomed thing motioned to him with her hand precisely in the manner of a human being, to have him desist and go away.

According to Emin Pasha, who was for a number of years Governor of an Egyptian province on the Upper Nile, and whom Stanley made his last expedition to ‘rescue,’ chimpanzees sometimes make use of fire. He told Stanley that, when a tribe of chimpanzees who resided in a forest near his camp came at night to get fruit from the orchards, they always came bearing torches to light them on their way. ‘If I had not seen it with my own eyes,’ he declares, ‘I never could have believed that these beings have the power of making fire’.^[5] This same authority relates that on one occasion a band of chimpanzees descended upon his camp and carried off a drum. The marauders went away in great glee, beating the drum as they retreated. He says he heard them several times after that, at night, beating their drum, in the forest.

The monkeys are little inferior to the man-like races in their intelligence and in the general similarity of their feelings and instincts to those of men. Monkeys live in tribes, and at the head of each tribe is an old male chief who has won his place by his strength, courage, and ability. Monkeys have excellent memories and keen observation, and are able to recognise their friends in a crowd even after long absences. They are proverbially imitative, have a strong desire for knowledge, and are exceedingly sensitive and sympathetic in their natures. Sympathy and curiosity, the two most prominent traits in simian psychology, are, significantly, the two most important facts in the psychology of man. Sympathy and curiosity lie at the foundation of human civilisation, sympathy at the foundation of morals, and curiosity of invention and science. The monkey whose diary appears in the closing pages of Romanes’ ‘Animal Intelligence’ was possessed of an almost ravenous desire to know. He spent hour after hour in exploration, examining with the indomitable patience of a scientist everything that came within the bounds of his little horizon. And when he had found out any new thing, he was as delighted over it as a boy who has solved a hard problem, repeating the experiment over and over until it was thoroughly familiar to him. Among the many things he discovered for himself was the use of the lever and the screw. Monkeys are the most affectionate of all animals excepting dogs and men. This affection reaches its culmination, as among men, in the love of the mother for her child. The mother monkey’s little one is the object of her constant care and affection. She nurses and bathes it, licks it and cleans its coat, and folds it in her arms and rocks it as if to lull it to sleep, just as human mammas do. She divides every bite with her little one, but does not hesitate to chastise it with slaps and pinches when it is rude. The monkey child is generally very obedient, obedient enough for an example to many a human youngster.

‘Very touching,’ says Brehm, from whom many of the foregoing facts are gleaned, ‘is the conduct of the mother when her baby is obviously suffering. And if it dies she is in despair. For hours, and even for days, she carries the little corpse about with her, refuses all food, sits indifferently in the same spot, and often literally pines to death’.^[4b]

Orphan monkeys, according to Brehm, are often adopted by the tribe, and carefully looked after by the other monkeys, both male and female. The great mass of human beings, who know about as much about the real emotional life of monkeys as wooden Indians do, are inclined to pass over lightly all displays of feeling by these people of the trees. But the poet knows, and the prophet knows, and the world will one day understand, that in the gentle bosoms of these wild woodland mothers glow the antecedents of the same impulses as those that cast that blessed radiance over the lost paradise of our own sweet childhood. The mother monkey who gathered green leaves as she fled from limb to limb, and frantically stuffed them into the wound of her dying baby in order to stanch the cruel rush of blood from its side, all the while uttering the most pitiful cries and casting reproachful glances at her human enemy, until she fell with her darling in her arms and a bullet in her heart, had in her simian soul just as genuine mother-love, and love just as sacred, as that which burns in the breast of woman.

The affection of monkeys is not confined to the love of the mother for her child, but exists among the different members of the same tribe, and extends even to human beings, especially to those who make any pretensions to do to them as they would themselves be done by. The monkey kept by Romanes, already referred to, became so attached to his master that he went into the wildest demonstrations of joy whenever his master, after an absence, came into the room. Standing on his hind-legs at the full length of his chain, and reaching out both hands as far as he could reach, he screamed with all his might. His joy was so hysterical that it was impossible to carry on any kind of conversation until he had been folded in his master’s arms, when he immediately grew quiet.

‘After I took this monkey back to the Zoological Gardens,’ says Romanes, ‘and up to the time of his death, he remembered me as well as the day he was returned. I visited the monkey-house about once a month, and whenever I approached his cage he saw me with astounding quickness—indeed, generally before I saw him—and ran to the bars, through which he thrust both hands with every expression of joy. When I went away he always followed me to the extreme end of the cage, and stood there watching me as long as I remained in sight.’

The following account of the attachment of a male monkey for his murdered consort is a pitiful tale of human inhumanity and of simian tenderness and devotion:

‘A member of a shooting-party killed a female monkey, and carried her body to his tent under a banyan-tree. The tent was soon surrounded by forty or fifty of the tribe, who made a great noise and threatened to attack the aggressor. When he presented his fowling-piece, the fearful effects of which they had just witnessed, and appeared perfectly to understand, they retreated. The leader of the troop, however, stood his ground, threatening and chattering furiously. At last, finding threats of no avail, the broken-hearted creature came to the door of the tent and began a lamentable moaning, and by the most expressive signs seemed to beg for the dead body of his beloved. It was given to him. He took it sorrowfully in his arms and bore it away to his expecting companions’.^[6a]

The chattering of monkeys is not, as is vulgarly supposed, meaningless vocalisation. It is language. It is meaningless to human ears for the same reason that the chattering of Frenchmen is meaningless to Americans—because human beings are foreigners. The conversation of monkeys is to convey thought. Every species that thinks and feels has means for conveying its thoughts and feelings, and the means for this exchange, whether it be sounds, symbols, gestures, or grimaces, is language. As Wundt somewhere says: ‘If psychologists of to-day, ignoring all that an animal can express through gestures and sounds, limit the possession of language to human beings, such a conclusion is scarcely less absurd than that of many philosophers of antiquity who regarded the languages of barbarous nations as animal cries.’ Mr. Garner, who has so long and so sympathetically associated with monkeys, has been able to translate a number of their words and to enter into slight communication with them. Among the words he has been able to understand are the words for ‘alarm,’ ‘good-will,’ ‘listen,’ ‘food,’ ‘drink,’ ‘monkey,’ and ‘fruit.’ According to him, the simian tongue has about eight or nine sounds which may be changed by modulation into three or four times that number, and each different species or kind has its own peculiar tongue slightly shaded into dialects. There may be more discriminating students than Garner, but few certainly who have approached their favourite problem with more feeling and humanity. Every one should read his beautiful book on ‘The Speech of Monkeys.’ ‘Among the little captives of the simian race,’ says he tenderly, in closing his chapter on the emotional character of these people, ‘I have many little friends to whom I am attached, and whose devotion to me is as warm and sincere, so far as I can see, as that of any human being. I must confess that I cannot discern in what intrinsic way the love they have for me differs from my own for them; nor can I see in what respect their love is less divine than is my own.’

Dogs are distinguished for their great intelligence, the pre-eminence of the sense of smell, fidelity to duty, nobleness of nature, patience, courage, and affection. In all of these particulars many individual dogs are superior to whole races of men. Dogs are more sensitive to physical suffering than savages, and will cry piteously from slight wounds or other injuries. Dogs of high life have genuine feelings of dignity and self-respect, and are easily wounded in their sensibilities. Such dogs have considerable sense of propriety, and suffer, like sensitive children, from disapprobation. Romanes had a dog that was so sensitive that he resented insult, and so sympathetic that he always fought in defence of other dogs when they were punished or attacked. When out driving with his master, this dog always caught hold of his master’s sleeve every time the horse was touched with a whip.^[6b] Romanes also tells of a Scotch terrier who, having grown old and useless, and been supplanted by a younger dog, Jack, became painfully jealous, and imitated his rival in everything that he did, even to ridiculous details, in order to retain the attentions of the household. When Jack was tenderly caressed, the old dog would watch for a time, and then burst out whining as if in the deepest distress.^[6c] Dogs communicate their ideas to each other and to human beings, generally by means of sounds and gestures. They growl in anger, yelp in eagerness, howl in despair, bark in joy or warning, bay in wonder, wail in bitterness and pain, whine in supplication, and prostrate themselves in submission or apology. It has been said that there never was a man who possessed the stateliness of a St. Bernard, the unerring sagacity of the collie, or the courage and tenacity of the bulldog. The vainest dandy is not more delicate in his ways than the Italian greyhound, nor more soft and affectionate than the Blenheim. Many a deed of heroism has been done by dogs which would, if done by men, have been honoured by the Order of the Victoria Cross. The St. Bernards belonging to the monks on the passes between Switzerland and Italy are especially celebrated for their devotion to the business of saving human life. They often lose their own lives in their efforts to rescue travellers baffled and overcome by storm. One particularly sagacious individual, who lost his life in this way some years ago, wore a medal stating that he had been the means of saving twenty-two human lives. In devotion the dog is superior to all other animals, not even excepting man. ‘How could one get relief from the endless dissimulation, falsity, and malice of mankind,’ exclaimed Schopenhauer in one of his inspired moments, ‘if there were no dogs into whose honest faces he could look without distrust?’ A dog will follow a handful of rags wrapped around a homeless beggar, day after day, through heat and cold and storm and starvation, just as faithfully as he will follow the purple of a king. The dog who stood over the lifeless body of his master, grieving for recognition and starting at every flutter of his garments, till he himself died of starvation, had in his faithful breast a nobler heart than that which beats in the bosom of most men. And the devotion of Greyfriars Bobby, who every night for twelve years, in all kinds of weather, slept on his master’s grave, was well worthy the marble tribute which to-day stands in Edinburgh to his memory. There has never been recorded in the history of the world an instance of more extravagant trust and devotion than that told of the canine companion of a certain vivisector, which licked the hand of his master while undergoing the crime of being cut to pieces. Such deeds of self-sacrifice remind one of the tales told of imaginary saints. But they are the deeds of only dogs—of beings whom half the world look upon with indifference and contempt, and whom the other half would feel, if they came within reach, under the strictest obligations to kick.

‘When some proud son of man returns to earth,
Unknown to glory but upheld by birth,
The sculptor’s art exhausts the pomp of woe,
And storied urns record who rests below;
When all is done, upon the tomb is seen,
Not what he was, but what he should have been;
But the poor dog, in life the firmest friend,
The first to welcome, foremost to defend,
Whose honest heart is still his master’s own.
Who labours, fights, lives, breathes, for him alone,
Unhonoured falls, unnoticed all his worth—
Denied in heaven the soul he had on earth.’

I am not one of those who regard the evidence for the post-mortem existence of the human soul as being either abundant or conclusive. But of one thing I am positive, and that is, that there are the same grounds precisely for believing in the immortality of the bird and the quadruped as there are for the belief in human immortality. And it is delightful to find great thinkers like Haeckel, great biologists and philosophers, holding the same conviction. Haeckel is the giant of the Germans, and in his brilliant book ‘The Riddle of the Universe’ appears this rather poetical paragraph: ‘I once knew an old head-forester, who, being left a widower and without children at an early age, had lived alone for more than thirty years in a noble forest of East Prussia. His only companions were one or two servants, with whom he exchanged merely a few necessary words, and a great pack of different kinds of dogs, with whom he lived in perfect psychic communion. Through many years of training this keen observer and friend of nature had penetrated deep into the individual souls of his dogs, and he was as convinced of their personal immortality as he was of his own. Some of his most intelligent dogs were, in his impartial estimation, at a higher stage of psychic development than his old stupid maid and his rough and wrinkled man-servant. Any unprejudiced observer who will study the psychic phenomena of a fine dog for a year, and follow attentively the processes of its thought, judgment, and reason, will have to admit that it has just as valid a claim to immortality as man himself.’

Fido was a shaggy terrier who lived years ago in the old home on the farm by the beautiful brook. He was one of the very first acquaintances the writer of these lines made on coming into existence. In his earlier years, before age had dimmed his mind and rheumatism had fastened upon him, he was an exceedingly agreeable and clever canine, active in all the affairs of the farm. He knew the old homestead by heart, and he took about as much interest in having everything go right as anybody—more, perhaps, even than we boys did. He chased the pigs out of the orchard without being asked to do so, and guarded the house at night with the vigilance of a hired watchman. He seemed to realise the demands of everyday situations about as well as any of us. He could distinguish between neighbours who were accustomed to come on the premises and strangers who were not. He always knew when company came, for he invariably attempted to profit by the fact. He had been taught early the propriety of keeping in the background when his tyrants were feeding, and ordinarily on such occasions he slept dutifully by the kitchen stove. But just as sure as a guest sat at table, Fido would turn up, and, tapping the visitor gently to get his attention, would sit up perfectly straight, with his paws pendent and a peculiar grin on his face, in expectation of a morsel. Dear old Fido! How much he thought of all of us! And how meagerly, as I know now, were his matchless love and services requited; On Sundays sometimes the human members of the household would go away and stay all day, and Fido and the cat would be left alone to get along the best way they could. He knew as well as any of us when these days came around, and he dreaded them. I suppose he had learned from experience to associate cessation of farm work and peculiar preparations with a day alone. The long, lonely hours probably affected him somewhat as they do a human being who is compelled to stay alone all day with nothing to do. But what a welcome he gave us in the evening when we came back! This was indubitable evidence of his loneliness. The first familiar object we would see in the evening, on coming in sight of home, was faithful Fido, sitting out in the road on the hill above the house—sitting straight up in that peculiar way of his—watching and waiting for our home-coming. He knew, or seemed to know, the direction from which to expect us, and was able to recognise us a long way off. The years have been many, and Fido’s dust has long been scattered by the gusts over the farms of north-west Missouri; but now, in fancy, I can see this faithful creature bounding down the road in the sunset to meet us, as he used to do in the golden long-ago, leaping and smiling and wagging his tail, and wriggling and barking in a perfect ecstasy of gladness.

Well, I know Fido could feel and think, that he loved and feared and longed and dreaded and dreamed and hated and grieved and sympathised and reasoned and rejoiced—in short, that he was moved by about the same passions and considerations as human beings usually are. He gave the same evidence of it precisely as a human being does.

The dog is the oldest of human associates. Long before the historical period the dog was domesticated in Europe, Asia, and Africa. No race of men is too primitive to be without the dog. The bones of the dog are found in the middens of the Baltic, and rude representations of it are chiseled on the oldest monuments of Egypt and Assyria. The dog was the servant of man away in paleolithic times, when the mastodon was on earth, and man was a naked troglodyte, and Europe extended westward to the Azores. And he has been a faithful friend, a tireless ally, and an enthusiastic slave of a thankless and inhuman master ever since.

Birds are pre-eminently emotional and artistic. This is shown by their fondness for singing, their fine dress, their pining for their dead, their dainty architecture, their pretty forms and manners of life, their joyousness, and their love for their young. Birds are the most beautiful and engaging of all terrestrial beings. Endowed with the power of flight, eminently active, light-hearted and free, attired in all the colours of the rainbow, and with voices of unrivalled richness and melody, birds are the admiration and envy of all of those that dwell on the earth. Birds possess naturally and in marvellous perfection that power of locomotion which has been so long sought for by slow-shuffling man. Birds are also incomparable musicians, no other animals, not even men, approaching them in the surpassing brilliancy and sweetness of their song. No human musician in high-sounding hall can equal the artless lay of the wild bird ringing melodiously through the leafy colonnades of the woods. Like men, birds sing chiefly of love; but they also sing for pastime or pleasure. Their singing is sweetest during the season of courtship, and attains its highest development in the males. Birds are ardent lovers. To win their brides, the males contend with each other, and display their charms of plumage and song with the wildness of human Romeos.

The song of birds is generally acquired by inheritance from the species, but is sometimes borrowed by imitation from other birds, or even from other animals. Birds taken from their species when young, before they have heard their native song, sing generally the song of their kind, but it is likely to be interspersed with notes and phrases from the birds around them. Birds thus isolated have been known to adopt entirely the song of their surroundings. Olive Thorne Miller vouches for the fact that an English sparrow she once knew grew up in company with a canary, and came in time to sing the song of its more talented companion to perfection. It must have been a Shakspere of a bird, however, to have soared so high above the excruciating accomplishments of the generality of its species.

The songs of birds can be set to music just as the melodies of men can. The songs of several birds were published in the American Naturalist a few years ago. And Winchell, the well-known English student of birds, has written a clever book on the ‘Cries and Call-notes of Wild Birds,’ in which he prints the calls and songs of most of the native birds of England. According to this writer, who has perhaps studied the music of birds more critically than anyone else, the song of the nightingale, when printed in the notation of ordinary human music, is like a piano solo. It is made up of a score or so of different strains, with trills and crescendos, and all executed in so inimitable a manner that it is unrecognisable when repeated on a musical instrument or the human voice. One of these strains, curiously enough, is identical with the song of a certain bush-warbler of western Canada—as if the English vocalist had plagiarised the song of its humbler cousin in compiling its incomparable repertoire. The song of the mocking-bird is a magnificent medley, made up of the calls, trills, twitters, warbles, warnings, and love-songs, of a score or more of other birds. I have heard this bird along the Solomon and Arkansas valleys repeat in the most perfect manner the notes and songs of the pewee, purple martin, kingbird, flicker, blue jay, catbird, canary, crow, English sparrow, red-headed woodpecker, quail, cardinal, cuckoo, robin, red-wings, grackle, meadowlark, night-hawk, whip-poor-will, besides many other calls and notes, perhaps of birds I did not know. In the case of some of these birds the mocker made all of the different sounds of each bird. The song of the mocking-bird is delivered at any time, day or night, and generally in a state of high ecstasy and excitement, the performer flying from tree to tree and from house-top to barn-top, occasionally throwing himself into the air in the most absurd manner, and all the time pouring forth such a stream of melody that one would think all the birds in the neighbourhood had suddenly come together and let loose in a grand festival of song.

According to Chapman, many of the notes of birds are language notes rather than sounds expressive of sentiment. Of the robin this well-known student of birds says: ‘The song and call-notes of this bird, while familiar to everyone, are in reality understood by no one, and offer excellent subjects for the student of bird language. Its notes express interrogation, suspicion, alarm, and caution, and it signals to its companions to take wing. Indeed, few of our birds have a more extended vocabulary.’ Winchell says that the common English sparrow has as many as seven different notes, which it uses to express the thoughts and feelings passing through its rather active but not very highly honoured head: (1) The common note of address of the male to the female; (2) a note of alarm used by both male and female adults, but never by the young; (3) an emphatic alarm note, always uttered by sentinels when a hawk is near or when a man approaches with a gun; (4) the note of the female when surrounded by several noisy and contending male rivals; (5) an autumn cry uttered by the first one of the company perceiving danger and flying up from the hedges and fields—never uttered by young, but by adults of both sexes; (6) the love note of both male and female, used mostly by the female, and generally with a fluttering or shaking accompaniment of her wings; (7) a curious note sometimes heard in London—meaning not well understood, but supposed to be a sort of chuckle or sign of contentment. Each one of these several different notes may be used to stand for various ideas depending on the circumstances by being given different emphasis and inflection, just as in the languages of many primitive races of men a small vocabulary of words is used to stand for a much larger number of ideas by being pronounced differently. In the Chinese language, for instance, the words are increased to three or four times the original number by modulation; but the same thing is observed in all languages, both human and non-human. Verbal poverty is pieced out by verbal variation. We say ać-cent or ac-cent́, depending on whether we wish to express the idea of a noun or a verb.

The memory of birds is well developed. Many of them remember the very grove or meadow, and even the very knot-hole or bush, in which they built their nest the season before, although in the meantime they have journeyed over lands and seas and sojourned thousands of miles away. Every year, for several seasons past, in late summer and early fall, after the nesting-time is over and the young ones are all grown, the purple martins have gathered in large numbers about the Field Columbian Museum, in Jackson Park, Chicago. They stay here for a few weeks, foraging the surrounding air for insects by day, and sleeping on the great dome of the Museum by night, finally flying away to be seen no more in such numbers till next year. These birds, many of them anyway, must remember from one year to another this annual assembly here by the big waters, else why would they come together at this particular spot from all over the country? I have no doubt that some of them, having sojourned here year after year for some time, remember well the great ugly building where they meet, and are more or less familiar with the surrounding locality from having searched it so often. I wonder what led to the establishing of the custom in the first place. Customs do not fall from the skies. And what advantage is there in the practice? What are they up to as they chirp and wheel in the air, and flutter up the slopes and sail down again, and perch on the pinnacles and twitter? Maybe it is a sort of Saratoga for them, where they all come together ostensibly to dip their bills in the blue waves, but where sons swell in their new feathers, and sly mammas find prospects for unmarketable misses.

A parrot has been known to remember the voice of its mistress after an absence of a year and a half—a very remarkable feat even for the grey matter of a bird. A flock of geese mentioned by Romanes showed their knowledge of the arrival of market-day, which came every two weeks, by assembling regularly on such days, early in the morning, in front of the town inn where the market was held, to pick up the corn. They never came on the wrong day; and on one occasion, when the market was omitted on account of a holiday, here came the unfailing fowls cackling and shouting as usual in merry anticipation of their fortnightly feast, but ignorant of the national necessities which had doomed them to be disappointed.^[6d]

Parrots remember and call for their absent friends, and mumble phrases in their dreams which have been taught to them. These gifted birds learn long poems by heart, and sing songs with considerable art. A parrot belonging to the canon of the Cathedral of Salzburg was given instruction regularly two hours every day for ten years, from 1830 to 1840. The bird became very proficient in speech and exceedingly intelligent. It took part in conversations, whistled tunes, and was able to sing a number of popular songs, among them an entire aria from Flotow’s opera of ‘Martha’.^[7a]

Educated birds though, like educated dogs, horses, cats, mice, men, and everything else, are very different beings from the uneducated. Cultivation is a key that unlocks all sorts of miracles. Cats are cultivated tigers; and the richest grains that ripen in the fields of men, and the loveliest flowers that blow, are only educated weeds. Even the flea may be taught to exchange leaping for walking, to draw a tiny wagon, to ride on the seat, to fire a toy cannon, and do many other feats.

There is one family of birds in which the superior size, gorgeousness, and vivacity, usual to the males, are found in the other sex, the females being the larger and more brightly coloured—the Phalarope family. Indeed, the members of this small family not only reverse the usual arrangement of the sexual characters of birds, but completely upset many of the most cherished traditions of the avian household. The female does the wooing, and takes the lead in selecting the nest site. And while she lays the eggs, the privilege of incubation she hands over magnanimously to her dull-coloured mate.

Birds have a keen observation and a good deal of that invaluable faculty known as common-sense. It is wonderful how quickly they learn to avoid telegraph-wires when these invisible but deadly gossamers are first stretched across a country, and how unerringly they keep at safe distances when hunted with firearms. An experienced crow can tell a cane from a gun-barrel almost as far as he can see it.

Nearly all birds build nests of some kind in which to cradle their eggs and young. The cow-bird and cuckoo (European), however, are exceptions. These birds have the rather human practice of turning their cares and labours over to somebody else. They are loafers and parasites. They lay their eggs secretly in the nests of other birds, where their eggs are hatched and their young cared for by an alien mother. I have seen a mother song-sparrow hustling about among the shrubs and grasses for an hour at a time almost, gathering food for a young cow-bird nearly twice as big as she was, while her foundling sat phlegmatically at the foot of a tree chirping and fluttering its wings, and acting as a thankless and apparently bottomless receptacle for the morsel after morsel laboriously harvested for it by its tireless little foster-mother. Sand-martins and kingfishers burrow in the earth and rear their broods in subterranean cradles; gulls and gamebirds build on the ground; the flamingoes and barn-swallows build mud nests; the woodpeckers mine holes in trees; doves and eagles make platforms of sticks; the tailor-bird bastes living leaves together; the social weavers construct great straw roofs covering the top of a tree, and build their nests on the limbs beneath; most singing birds build daintily-lined baskets, and swing them in trees and bushes.

It is often said that all the birds of a species build their nests in precisely the same way, and that, while men change and improve their dwelling-places from generation to generation, birds build their abodes in the same old way, just as their ancestors built theirs centuries and centuries ago. This is a favourite thought with the fogies, with those who change not in their thinking from the ways hacked out for them centuries and centuries ago. Birds are like men. Some of them—some races and some individuals—are much more given to initiative than others. There is as wide a difference between the hang-bird and the auk in the construction of their domiciles as between the millionaire and the savage. And the hang-bird has come by her home-making art through centuries of improvement, just as the millionaire has arrived at his. It is believed by ornithologists that the first nests of birds were the niches of rocks or simple hollows scooped in the sand and soil, such as are still seen among the more primitive bird races, and that from these aboriginal beginnings have come, through ages of evolution, the elaborate creations of the cotton-bird, weaver-bird, tailorbird, oven-bird, the baya-sparrow, the finches, and the orioles. The savage who lives unmolested generation after generation in the same land and country builds his simple hut in just the same way as his ancestors built theirs, and thinks the same things his ancestors thought a thousand years before him. Sir Samuel Baker, in a paper on ‘The Races of the Nile Basin,’ points out that each tribe of men in eastern Africa, like each species of bird, has its own peculiar style of hut, and that the huts of the various tribes are as constant in their types as are the nests of birds. The same thing is true of their headdresses as of their huts; and this fixed character exists also in their languages, customs, and religions. It is only some races of men that are given to growth and fluidity, and only some men of these special races.

Right in our own country, among the remote mountain recesses of Appalachia, surrounded on all sides by the most wonderful development, material and intellectual, the world has ever seen, lives a race of rude mountain folk almost as aboriginal in their ways and views of life, and as unaffected by civilisation, as if they were in the heart of Africa. They live huddled together in one-room log-cabins without windows or floors, eat bacon and cornmeal, carry on almost constant wars, and execute the deputies of civilisation who happen to stray into their illicit dominions, just as they have done from the time these mountain silences were first broken by them 150 or 200 years ago.

Birds, as a rule, use a great deal of care and thought in the location of their nests. After they have selected a certain grove or field as the one best suited to their purposes, or as the one around which cluster the happiest memories, it usually requires several days of flying and peeping about, of spying and exploration, before the exact spot for the precious domicile is finally settled upon. It is a delicate matter for many birds, for security from sun, storm, and enemies must all be taken into account. Old birds, as has been frequently observed, build better nests and select more clever locations for their nests than the young and inexperienced. The nest-building habits of many birds are known to have changed during the past few hundred years. The American house-swallow did most certainly not build under the eaves of human houses 300 years ago, nor did the hair-bird in her nest with horsehair as she invariably does now. The fact that wrens, swifts, and martins now build almost altogether in boxes and chimneys shows that birds are able and willing to adapt themselves to new conditions. The chimney-swift and purple martin, it is said, still cling to their aboriginal custom of rearing their young in hollow trees in the unsettled parts of America. The indomitable house-sparrow builds its nest almost anywhere, from knot-holes and tin cans to electric-light globes and tree-tops. Its original dwelling was probably an arboreal affair, like that of other sparrows, and different nesting-places have been adopted as a result of its association with man. Not only in its architecture, but in several other ways, this bird has departed from the traditions of its tribe. The Fringillidae (the sparrow family of birds) are seed-eaters, both in structure and practice. But the house-sparrow, since it left the fields and groves to become a gamin on human streets, has learned to eat almost anything, and one thing, too, about as cheerfully as another. The varied habits of this bird are probably due to its natural elasticity in the first place, supplemented by the unsettling influences of its rather kaleidoscopic experiences during the past few hundred years.

The fear of birds for man is an acquired trait due to ages of persecution. If man would treat birds kindly, they would act toward him as they do toward any other friendly animal. When unfrequented islands are first visited by man, the birds are found to be perfectly fearless of him, flying about him, feeding from his hand, and manifesting no more timidity than if he were a big-hearted bird himself. Darwin states that, when he stopped at the Galapagos Islands on his famous trip around the world in the Beagle, he found the birds there so tame that he could push them from the branches of the trees with his gun-barrel. Professor Cutting, of the State University of Iowa, in an article in the Popular Science Monthly for August, 1903, tells of the almost absolute fearlessness of the birds on the island of Laysan, an isolated atoll in the Pacific west of the Hawaian Islands, which he visited during that summer. The island swarms with bird life—petrels, albatrosses, and tropical birds of various kinds—and these birds betray no more fear in the presence of man than if he were a cow. The albatrosses were so numerous and so indifferent to the presence of man that it was necessary to shove them aside with one’s foot to keep from stepping on them when one went for a walk along the sand-stretches of the shore. Professor Cutting took photographs of birds which literally posed for him in all sorts of positions, and half-savage jackies amused themselves by going about and pulling the pretty tail feathers from the tropical birds as they sat on their nests. I have known of two cases where persons, by going to the same place day after day with food and kindness, have in the course of a few weeks taught robins, sparrows, and other birds, to lose all fear of them, so much so as to sit on their shoulders and arms and eat out of their hands. This is the spirit all birds would show all the time toward their featherless lords if these featherless ones would only treat them with half the consideration they merit.

The love of a bird for the treasures of her nest is one of the most beautiful things of this world. Mother-like, the parent bird will do anything almost for the sake of her little ones. Who has not seen the kildeer strive with all the tact of her clever little soul to allure some big giant of a human being, who has wandered into her neighbourhood, away from her nest of precious young? Many a time as a boy on the farm I have followed one of these birds limping and tumbling and fluttering along on the ground a few feet ahead of me, utterly disabled, as I supposed, but always managing to keep just a little beyond the reach of my eager hands. And when the artful mother has led me far from the sacred spot where lay all there was in this world to her, how triumphantly she has lifted herself on her unharmed wings and, to my utter astonishment, sailed away. The partridge and the mourning-dove are, if possible, even more artful in their acting than the kildeer. After I became a large boy and had been told the meaning of these exhibitions by parent birds, I often followed the mourning-dove, thinking the bird must be really wounded after all, so perfectly did it pretend. But the cunning of the kildeer is not confined to luring one away from the nest. If by some accident one finds her nest (and the nest is so cleverly concealed that, if it is discovered at all, it will be by pure accident), the resourceful mother is ready with other expedients to outwit you. She watches you all the time from the proper distance, and knows by your conduct the moment you have found her nest. And before you have even had time to admire the skill displayed by the mother in blending so perfectly her abode with its surroundings, a single peculiar note from her has caused the whole nestful of cuddling young ones to dart out of their cradle and disappear among the surrounding clods as if by magic. No amount of searching can find one of them. They have vanished as effectually as if they had evaporated. And it is enough to touch the heart of the most indifferent to see the anxious mother bird, as I have seen her from the cranny of a neighbouring rock-pile, come back to her nest and call her scattered children together again after they have once dispersed at her command. Circling around the nest two or three times to assure herself that no one is nigh, she alights and begins a low clucking sound like that of a hen calling her brood. The little ones come out of their hiding-places one after another as mysteriously as they vanished. You can’t see for the life of you where they come from. They seem to just emanate. And if one of them fails to come at her call—for the devoted mother knows very well just how many she has—she extends her search farther out from her nest, looking all around and keeping up that peculiar little cluck, until the half-scared-to-death little slyboots finally comes creeping out from his improvised snuggery somewhere. If a kildeer’s nest has once been found, and the mother feels that it is in danger of future visits, she will move her family at night to some other locality, and it is practically impossible ever to find it again. The family relations of the ring-dotterels are said to be ‘so charming and touching that even hunters recoil from shooting a female surrounded by her young ones.’

Human beings, true to their instinct never to call into action their ability to think if they can employ their faculty for nonsense instead, call this love of the mother bird ‘machinery.’ But there are some of us (and our numbers are increasing) who are disposed to put off the adoption of this conclusion until we go mad. The bird builds her nest, weaving it of the rarest fibres. She hides it in the copse or prudently hangs it far out on some inaccessible bough. She lays her beautiful eggs, and hatches them with the warmth and life of her own breast. She tends her young, bringing them food and drink, and watching over them with a tender and tireless vigilance. She protects them in storm with her own little body, worries about them when danger lurks, and dreams of them, no doubt, as she rocks and sleeps under the silent stars. She sings to them in the overflow of her gladness and hope, and risks her very existence to shield them from harm. She teaches them to fly, to find their food, and to detect their enemies. She is true to her mate, and her mate is true and kind to her. As the days of summer shorten, and the cool, long nights warn of approaching autumn, she leads her children away from the old place, she and her faithful mate, out into the wide old world. And I say there is love in the heart of that mother as truly as in the heart of woman, and there are joy and genuineness and sorrow and fidelity in that sylvan home more sacred than may sometimes bloom in the cold mansions of men.

Conjugal love is also very strong in many of the feathered races, especially among those in which the wedding is for successive seasons or for life. The pining of love-birds for their dead sweethearts is well known. The mandarin duck is proverbial for its marital faithfulness, and a pair of these fowls is carried by the Chinese in their marriage processions as an emblem of constancy. Many instances are recorded of birds, after having been deprived of their mates, refusing steadfastly the attentions of other birds, and even sometimes separating themselves entirely from the society of their kind. The following account of the devotion of a widowed pigeon for her deceased consort sounds like a tale of human woe:

‘A man set to watch a field much patronised by pigeons shot an old male pigeon who had long been an inhabitant of the farm. His mate, around whom he had for many a year cooed, whom he had nourished with his own crop and had assisted in rearing numerous young ones immediately settled on the ground by his side She refused to leave him, and manifested her grief in the most expressive manner. The labourer took up the dead bird and hung it on a stake. The widow still refused to forsake her husband, and continued day after day slowly walking around the stake on which his body hung. The kind-hearted wife of the farmer heard of the matter, and went to the relief of the stricken bird. On arriving at the spot, she found the poor bird still watching at the side of her dead, and making an occasional effort to get to him. She was much spent with her long fasting and grief. She had made a circular beaten path around the corpse of her companion’.^[8a]

And these are the beings whose bones men jest over at their feasts, and brutes shoot for pastime on human holidays. Much has been said of the sorrow of birds for their deceased mates, but not too much. For the avian soul may be smothered by the gloom and loneliness that come upon the heart, when the great light of love and companionship has gone out, quite as completely as the soul of a bereaved human. In not many human homes where loved ones lie sick and dying are felt the pangs of more genuine grief than those sometimes suffered by birds when their friends and companions are stricken in death. The following incident, vouched for by Dr. Franklin, who observed it, is only one among many such instances recorded in the literature on birds:

A pair of parrots had lived together on the most loving terms for four years, when the female was taken with a serious attack of gout. She grew rapidly worse, and was soon so weak as to be unable to leave her perch for food, when the male, faithful and tender as a human spouse, took it upon himself to carry food to her regularly in his beak. ‘He continued feeding her in this way for four months, but the infirmities of his companion increased day by day, until at last she was no longer able to support herself on the perch. She remained cowering down in the bottom of the cage, making from time to time ineffectual efforts to regain her perch. The male was always near her, and did everything in his power to aid the feeble efforts of his dear better-half. Seizing the poor invalid by the beak or the upper part of her wing, he tried his best to enable her to rise, and repeated his efforts several times. His constancy, his gestures, and his continued solicitude, all showed in this affectionate bird the most ardent desire to relieve the sufferings and assist the weakness of his sinking companion. But the scene became still more affecting when the female was dying. Her unhappy consort moved about her incessantly, his attentions and tender cares redoubled. He even tried to open her beak to give some nourishment. He ran to her, and then returned with a troubled and agitated look. At intervals he uttered the most plaintive cries; then, with his eyes fixed on her, kept a mournful silence. At length his companion breathed her last. From that moment he pined away, and in the course of a few weeks died’.^[6e]

Even the rough-looking ostrich has sensibility enough to die of a broken heart, as was the case in the Jardin des Plantes at Paris a few years ago. There is many a heart with a slabless grave far from the haunts of men, and many a tear in secret brews that never wets the eye.

The individual who has never acquired the enthusiasm for a knowledge of the birds and a love for their presence and association has omitted some of the richest emotions of life. ‘The sight of a bird or the sound of its voice is at all times an event of such significance to me,’ says Chapman, ‘a source of such unfailing pleasure, that when I go afield with those to whom birds are strangers I am deeply impressed by the comparative barrenness of their world, for they live in ignorance of a great store of enjoyment that might be theirs for the asking.’

‘I cannot love the man who does not love, As men love light, the song of happy birds.’

I have seen a mother mouse in a moment of peril flee from her home among the falling pieces of a cord-wood pile, and disappear under the roots of a neighbouring oak. I have seen her a little later, recovered from her initial dismay, making her way back again, clambering along among the tangled timbers, stopping now and then to look and listen, her eyes wild and anxious, and her whole little body quaking with excitement. I have seen her go among the ruins of her dwelling, take a poor little squeaking young one in her mouth, and hurry away with it to the gloomy refuge in the roots of the oak. I have watched her return again and again, each time taking in her careful teeth the tiny body of a babe, until five mouthfuls of precious pink were safely lodged within the fortress of the oak. And I could as soon believe that woman, when she saves her children from some fearful harm, is a soulless machine as think that that brave little wood-mother, out there alone under the trees, snatching her darlings from the jaws of death, was a heroine without sense or feeling. That little hairy mother with four feet and bead-like eyes loved her young ones in just the same way and for just the same reason as a human mother loves her young ones. She looked upon her babies, in all probability, with the same mother-love and tenderness as a human mother looks upon hers, and felt in miniature, with evil hovering above them, the same consternation a woman feels when destruction reaches out after those that are nearest and dearest. And when it was all over, when the good angel of deliverance had finally spread its healing white wings over that afflicted family, the heart of that little rodent was doubtless soothed by the same joy as that which, in the hour of deliverance, calms the hearts of humankind.

Ants tend their fields, gather their harvests, domesticate other insects, and keep slaves. They help each other bear heavy burdens, extricate each other from misfortune, speak to each other when they meet, and bury their dead. They build roads and bridges, and manifest wonderful engineering skill in their construction. They even tunnel under rivers. They go far from home, and find their way back again. They inhabit towns, and build splendid and spacious palaces. Each ant knows every other citizen of its own town, and an ant from any other town is immediately recognised as a foreigner. Ants have their overseers of industrial enterprises, and regular hours for work and sleep. The ant is the most pugnacious of all animals, and the most muscular compared with its size. It will boldly attack the biggest creature that walks if this creature invades its home. It will fasten its mandibles into an enemy, and allow itself to be torn to pieces without relaxing its hold. Among some savage tribes, certain species of ants are said to be used as surgeons. Infuriated ants are allowed to fasten their mandibles on the opposite edges of a gash, and in this way the wound is closed. The ants are decapitated, and their bodiless heads with their relentless jaws serve as stitches to the wound. Ants have holidays and athletic festivals. On such occasions they romp and chase each other and play hide-and-seek like children. They stand on their hind-legs, embrace each other with their fore-limbs, grasp each other by the feet or antennae, pull each other down the entrances to their towns, wrestle and roll over on the sand, and so on—all in the friendliest manner. It is greatly to the credit of these little people that no observer has ever yet known them to become so inventively helpless or so athletically hard up as to play slug-ball. Ants educate their young, and practise the fundamental principles of human states and societies. Forel, the great Swiss student of ants, says that several hundred nests are sometimes united into a single confederation. Each ant knows every other ant of the entire confederation, and they all take part in the common defence. Haeckel says, speaking of social evolution in ants, that the aboriginal ants of the Chalk Age had as little idea of the division of labour and organisation of modern ant states as paleolithic flint-chippers had of the complexity and organisation of twentieth-century civilisation. ‘If we take an ant’s nest, we not only see that work of every description—rearing of progeny, foraging, building, rearing of aphides, and so on—is performed according to the principles of voluntary mutual aid, but we must also recognise, with Forel, that the fundamental feature of the life of many species of ants is the obligation of every ant to share its food, already swallowed and partly digested, with every member of the community which may apply for it. Two ants belonging to the same nest or to the same confederation of nests will approach each other, exchange a few movements with the antennae, and if one of them is hungry or thirsty—and especially if the other has its crop full—it immediately asks for food. The individual thus requested never refuses. It sets apart its mandibles, takes a proper position, and regurgitates a drop of transparent fluid, which is licked up by the hungry ant. Regurgitating food for others is so prominent a feature in the life of the ants, and it so constantly recurs both for feeding hungry comrades and for feeding larvae, that Forel considers the digestive tube of ants to consist of two different parts, one of which—the posterior—is for the special use of the individual, and the other—the anterior part—is chiefly for the use of the community. If an ant which has its crop full has been selfish enough to refuse to feed a comrade, it will be treated as an enemy. If the refusal has been made while its kinsfolks were fighting with some other species, they will fall upon the greedy individual with greater vehemence even than upon the enemies themselves. All this has been confirmed by the most accurate observations and experiments’.^[9]

Ants keep slaves. And the slaves, in some instances, carry their masters about, feed them, groom them, and attend to their every want, just as human lackeys do helpless aristocrats. In some species the institution of slavery is so old that the physical structures of the masters have been modified until the masters are physically unable to feed themselves, and will perish from hunger, though surrounded by food, if they are left to themselves. The brain of the ant, as Darwin says, is one of the most wonderful bits of matter in the universe. It is scarcely one-fourth the size of the head of a pin, yet it is the seat of the most astonishing wisdom and activity. If human intelligence were as great, compared with the mass of the human brain, as is the ant’s, man would be several hundred times as wise as he is now, and would then probably not fall far short of that state of erudition which the average man imagines he already represents. Ants remember, and a fact becomes impressed by repetition, showing that the faculty of memory in ants is governed by the same laws as is this faculty in man. Sir John Lubbock found it necessary to teach his ants the way by repeating the lesson where the way was long or unusual. ‘Sensation, perception, and association follow in the social insects, on the whole, the same fundamental laws as in the vertebrates, including ourselves. Furthermore, attention is surprisingly developed in insects’ (Forel). Ants keep standing armies, make alliances, and maraud neighbouring states. They have their wars, civil and foreign, and their massacres and enslavements of the conquered. But they have never got so low yet, so far as anyone knows, as to hypocritically prosecute their conquests in the name of God and humanity. The battlefields of ants resemble the carnage-plains of men, strewn with ghastly corpses and covered with the headless and dying. And the accounts of their expeditions—their going forth in regular columns, with captains, scouts, and skirmish lines, their battles, and their return laden with plunder and captives—read like the grisly tales of human history. Ants perform, in short, about all the antics of civilised man, except maltreating the females and drinking gin. And shall we say their civilisation is less real because it is miniature and because it is carried on far below the Brobdingnagian contemplations of man? ‘When we see an ant-hill tenanted by thousands of industrious inhabitants, excavating chambers, forming tunnels, making roads, guarding their home, gathering food, feeding the young, tending their domestic animals, each one fulfilling its duties industriously and without confusion, it is difficult altogether to deny them the gift of reason or to escape the conviction that their mental powers differ from those of men not so much in kind as in degree’ (Lubbock).

The industrious and gifted bee, with its wonderful social system, in advance even of that of the most enlightened societies of men; the generous horse, who thinks and feels so much more than the clowns who maul him ever suspect; the artful spider, that confirmed waylayer lurking in his lair of silk; the soft and predaceous cat; the timid-hearted hare, poor hounded little dweller of the fields and stream-sides; the beautiful and vivacious squirrel; the lowly lady-bug; the cautious fox; the irascible serpent, so cruelly misunderstood by men; the patient camel; the scornful peafowl; the indomitable goat; the grave and vindictive elephant; the ingenious beaver, the woodman of the primeval wilderness; the lordly and polygamous cock; the maternal hen; the wary trout, beset everywhere by the villainous traps of impostors; the bride-like butterfly; the delicate antelope and deer; and the sturdy, incorruptible ox—all of these beings have within them souls composed primarily of the same elements as those that compose the souls of men.

Ground-wasps have been observed to use tiny stones as hammers in packing the dirt firmly over their nests—a very remarkable act of intelligence, since the use of tools is not common even among the higher mammals.^[10]

Fishes have been taught to assemble at the ringing of a bell, and toads and tortoises to come at the call of their favourite friends. An alligator which was kept tame for several years became so much attached to its master that ‘it followed him about the house like a dog, scrambling up the stairs after him, and showing much affection and docility.’ The favourite friend and companion of this alligator was the cat; and, whenever the cat stretched herself on the floor in front of the fire, the alligator would lie down beside her, with its head on the cat, and go to sleep. ‘When the cat was absent, the alligator was restless, but it always appeared happy when the cat was near it’.^[8b]

Wolves and foxes sometimes cooperate with each other in their hunting expeditions, somewhat as men do in theirs. One of their number will crouch in ambush by the side of a road known to be used by hares or other small animals, and leap on the unsuspecting fugitives when driven that way by others of the hunting band. Many animals post sentinels when they eat or sleep or engage in other hazardous undertakings, and these sentinels show a good deal of discrimination in distinguishing between animals that are friendly and those that are not. Beavers not only build lodges to live in, but also construct dams to keep the water in which the villages are located at a certain height. The outlet of these dams is carefully regulated, being regularly lessened and enlarged to suit the supply of water in the stream. The trees used by the beavers in their enterprises are felled by them along the margins of the stream, and floated to the place where they are used. In old communities, where the supply of timber near the stream has been exhausted, artificial canals are cut by these indomitable engineers for use in the transportation of their materials. These excavations are made at a great cost of labour and for the deliberate purpose of enabling the builders to accomplish that which they could not accomplish in any other way. ‘In executing this purpose,’ says Romanes, ‘there is sometimes displayed a depth of engineering forethought over details of structure required by the circumstances of special localities which is even more astonishing than the execution of the general idea’.^[6f] When, for instance, a canal has been carried so far from the original water-supply that, owing to the rising ground, it cannot be continued without a very great expenditure of effort in digging, a second dam is built higher up-stream, and with water drawn from this the canal is continued on at a higher level. Sometimes a third dam is built above the second, and the canal again continued at a still higher level before the valuable timber of the higher grounds is reached. These enterprising rodents also carve sometimes enormous channels across the necks of land formed by winding rivers, to serve as cut-offs in travel and transportation. And yet all of these things—all of the intelligence, feeling, and ingenuity displayed by the non-human races—are still lumped together by belated psychologists under the head of ‘instinct,’ by which is meant a blind, unconscious knack of doing the right thing without in any way realising what is being done or what it is being done for! The principle in accordance with which mind is denied to non-human beings would, if carried to its legitimate conclusions, make machines out of all of us, and limit the possession of conscious intelligence to the individual who promulgates the theory. The attitude assumed by many psychologists toward the mental faculties of inferior races reminds one of Heine’s interview with the old lizard at Lucca. In the discussion which ensued between the poet and the reptile, the poet dropped the words, ‘I think.’ ‘Think!’ snapped the lizard with a sharp, aristocratic tone of profound contempt—‘think! Which of you thinks? For 3,000 years, wise sir, I have investigated the spiritual functions of animals, and I have made men and apes the special objects of my study. I have devoted myself to these queer creatures with as great zeal and diligence as Lyonnet to his caterpillars. And as the result of my researches, I can assure you no man thinks. Now and then something occurs to him, and these accidentally occurring somethings he calls thoughts, and the stringing of them together he calls thinking. But you can take my word for it, no man thinks—no philosopher thinks. And, so far as philosophy is concerned, it is mere air and water, like pure vapours in the sky. There is, in reality, only one true philosophy, and that is engraven in eternal hieroglyphics on my own tail’.^[7b]

This attitude of the lordly saurian toward the human race is a stinging burlesque on the anthropocentric conceit which perverts all of man’s views of the other orders of life.

It is not contended that non-human beings are psychically identical with human beings. The races of men are not psychically identical with each other. The difference between the intellectual splendours of a Spencer evolving volumes of the profoundest philosophy and the mind of an Australian who cannot count six, or between the understanding of an Edison, the wizard of the electrical world, and that of the South Sea islanders, who, when Captain Cook gave them some English nails, planted them in the hope of raising a new crop, is almost infinite. The lowest races of men have neither superstition nor the power of abstract thought as have the higher races. They have a word for black stone, white stone, and brown stone, but no word for stone; for elm-tree, oak-tree, and the like, but no word for tree. As Kingsley says, ‘It is difficult to believe that a dog does not form as clear an abstract idea of a tree as these people do.’ There are human beings living in the forests of Asia, Africa, and Australasia that wander about from place to place in herds without chief, law, weapons, or fixed habitations. They go naked, mate by chance, and climb trees like monkeys. Some of these races know nothing of fire, religion, or a moral world, chatter to each other like apes, and live on such natural products as roots, fruits, serpents, mice, ants, and honey. One of these creatures, we are told, will lie flat on his front for an hour by the runway of a field-mouse, waiting for a chance to snatch up the little creature when it comes along and eat it. Dozens of such degraded races are mentioned by Blichner in his ‘Man: Past, Present, and Future,’ and by Sir John Lubbock in his ‘Origin of Civilisation.’

Non-human beings have, as a rule, neither the psychic variety nor the intensity of higher humans. And it is not contended that in language, science, and superstition they are capable of being compared with the foremost few of civilised societies, any more than savages, especially the lowest savages, are capable of such comparison. But it is maintained that the non-human races of the earth are not the metallic and soulless lot of fixtures they are vulgarly supposed to be; that they are just as real living beings, with just as precious nerves and just as genuine feelings, rights, heartaches, capabilities, and waywardnesses, as we ourselves: and that, since they are our own kith and kindred, we have no right whatever, higher than the right of main strength (which is the right of devils), to assume them to be, and to treat them as if they were, our natural and legitimate prey.

[1.] Darwin: Expression of Emotions in Men and Animals; New York, 1899.
[2.] Starr: Human Progress; Pennsylvania, 1895.
[3a.] [3b.] [3c.] Hartmann: Anthropoid Apes; New York, 1901.
[4a.] [4b.] Brehm: From North Pole to Equator; London, 1896.
[5.] Stanley: In Darkest Africa, vol i.; New York, 1890.
[6a.] [6b.] [6c.] [6d.] [6e.] [6f.] Romanes: Animal Intelligence; New York, 1899.
[7a.] [7b.] Evans: Evolutional Ethics and Animal Psychology; New York, 1898.
[8a.] [8b.] Jesse: Gleanings in Natural History, vol. i.; London, 1832.
[9.] Kropotkin: Mutual Aid a Factor of Evolution; New York, 1902.
[10.] Peckham and Peckham: Instincts and Habits of the Solitary Wasps; Madison, Wisconsin, 1898.

IV. The Elements of Human and Non-human Mind Compared.

The analysis of human mind and the comparison of its elements or powers with the powers of non-human mind corroborate the conclusions already arrived at through observation and deductive inference. The chief powers of the mind of man are sensation, memory, emotion, imagination, volition, instinct, and reason. All of these faculties are found in non-human beings, some of them developed to a much higher degree than they are in man, and some of them to a much lower.

Sensation is the effect produced on the mind when a sense organ is affected in some way by external stimuli. Sensation is the lumber of the mind, the raw material out of which are elaborated all other forms of consciousness. The chief species of sensation are those of sight, sound, smell, taste, and feeling. The original sense was feeling, and out of this sense were evolved the other four. The organs of seeing, hearing, smelling, and tasting are therefore modifications of the skin, which is the organ of original sense. The fact that in all animals, down almost to the very beginnings of life, sense organs exist, suggests that sensation may be almost, if not quite, coextensive with animal life. All mammals, birds, reptiles, amphibians, and fishes have the same special sense organs as man, and the organs of sight, sound, taste, and smell occupy in all vertebrates the same relative positions in the head. Birds see better than any other animals, and carnivora smell better. Ruminants see, hear, and smell with great acuteness. Fishes also see and hear well; and the wings of the bat are so exceedingly sensitive that it will move about blindfolded and with ears stopped with cotton almost as unerringly as when aided by sight and sound. Insects have smell, sight, and taste well developed, as is shown by their keen appreciation of the colours, perfumes, and flavours of flowers. They also hear. Stridulation proves this. Worms have eyes and ears, and land-leeches scent the approach of their prey at a long distance. The starfish and the medusa respond to all the five classes of stimuli which affect the five senses of man, and nervous substance is found in all animals above the sponge.

Memory is the power of retaining or recognising past states of consciousness. The power to retain impressions follows in origin close upon the power to receive impressions. Memory is the historic faculty of the mind—the power of the mind to store up its experiences—and is found in nearly all animals. The lowly limpet, whose world is a seaside rock, will come back from its little roamings time after time to the same rude lodge from which it set out. Bees remember where they get honey or sugar months afterwards, and when it is necessary will sometimes go back to the old home hive which they left the year before. Ants retrace their steps after making long journeys from their nest, and are able in some way to recognise their friends after months of separation. The stickleback (fish) knows the way back to his nest, although he has been absent several hours. Fishes return and hatch their young year after year in the same waters; birds come back to their old nesting-places; and horses remember their way along devious roads over which they have not been for years. Horses used in the delivery of milk, or in other occupations in which they are accustomed to travel daily over about the same route, come in time to remember every alley, street, and stopping-place of the whole round almost as accurately as their drivers. Darwin’s dog remembered and obeyed him after an absence of five years. The power of dogs, squirrels, and other animals of remembering where they have long before cached food is indeed wonderful. A squirrel will come down out of a tree when the earth is covered to a depth of several inches with lately fallen snow and hop away, without the slightest hesitancy or mistake, to the exact spot where it has months before stored its mid-winter acorns. A lion has been known to recognise its keeper after seven years of separation, and an elephant obeyed all his old words of command on being recaptured after fifteen years of jungle life. The similarity of memory in other animals to the same faculty in man is shown by the fact that memory everywhere is governed by the same laws. In all animals, including man, memory is strengthened by repetition—that is, impressions are always deepened and confirmed by being made over and over. A parrot or a raven masters a new sentence by working at it and saying it over and over again, just as a boy memorises his rules and catechisms.

Imagination is the picturing power of the mind. In its lowest stages of manifestation it is akin to memory. Imagination, however, in its higher reaches, not only reimages previous impressions, but combines them in new and original relations. Imagination is displayed in dreams, images, delusions, anticipation, and sympathy. It also furnishes wings for speculation and reason. Spiders, when they attach stones to their webs to steady them during anticipated gales, probably exercise imagination. The tame serpent which was carried away from its master’s house and found its way back again, though the distance was one hundred miles, no doubt carried in its imagination vivid pictures of its old home.^[1a] Cats, dogs, horses, and other animals dream, and parrots talk in their sleep. Horses and cattle sometimes stampede at imaginary objects, and often distort real objects into imaginary monsters. When a horse at night takes fright at a big black stump by the roadside, he no doubt imagines it to be some terrible creature ready to eat him up if he should go near it, just as a timid child does in the same circumstances. There is a great difference in horses in this respect, just as there is among children and men, some of them taking fright at every unusual thing, while others are more bold or stolid. The cat playing with a ball of yarn converts it by means of its imagination into an object of prey, just as a girl converts a doll into a baby, or a boy changes a stick into a steed. Sympathy is the putting or picturing of one’s self in the place of another, and by means of the imagination sharing or simulating the psychic conditions of that other. This high and holy exercise of the imagination is exhibited by horses, cattle, dogs, deer, elephants, monkeys, and birds—in fact, by nearly all animals as far down as the fishes and insects.

Emotion is the stirring of the sensibilities by way of the intellect or the imagination. The following emotions are found in non-human beings: fear, surprise, affection, pugnacity, play, pride, anger, jealousy, curiosity, sympathy, emulation, resentment, appreciation of the beautiful, grief, hate, cruelty, joy, benevolence, revenge, shame, remorse, and appreciation of the ludicrous. Excepting the emotions of conscience and religion, which are really compounds, with fear as the main ingredient, this list of non-human emotions is coextensive with the list of human emotions. Many of these emotions germinate low down in the animal kingdom, fear, anger, sexuality, and jealousy all being found in fishes and in the higher invertebrates. In the higher vertebrates many of these emotions are almost as strong as they are in men. Does anyone who has felt the throbbing sides of a frightened puppy or hare have any doubt that these creatures suffer the keenest agony of fear? Apes have been known to fall down and faint when suddenly confronted by a snake, so great is their instinctive horror of serpents; and gray parrots, which are extremely nervous birds, have been known to drop from their perch unconscious under the influence of great fear.^[2]

The horse is, perhaps, of all animals, the one which occasionally gives itself over most completely to the emotion of fear, as everyone who has witnessed the terrible abandon of a runaway team can testify. Ants, fishes, birds, cats, dogs, horses, monkeys, porpoises, and many other animals play. Young kittens, colts, and puppies enjoy a scuffle about as well as boys do. Pugnacity originates among the spiders and insects, and is highly developed in the ant, cock, and bulldog. This emotion is strong in the males of nearly all vertebrates. Anyone who has observed the vigilance displayed by fishes in protecting their nests can have little doubt that these comparatively primitive beings possess pugnacity. I was one evening floating in a boat by the edge of a Long Island pond just over a village of perches. Each nest was guarded by an assiduous male, who hovered over it vigilantly, or darted this way and that to drive off the piscatorial hoi polloi hanging about the neighbourhood, ready to slip in at the first opportunity and eat the eggs. Just to see what would happen, I put my hand down into the water and moved it slowly toward one of the nests. To my surprise, the guardian of the nest, instead of fleeing in alarm, proceeded to show fight. It chased my hand away time after time, and when the hand was not removed it would nip it vigorously, not once simply, but two or three times if necessary, and each time with increasing energy. It contended with the courage of a little hero. I pushed it and jostled it about, and even took it in my hand and lifted it clear out of the water. To my amazement, on getting back into the water, it returned promptly to the attack. It fought until it was really fagged, for its onsets were at last much feebler than at first. I came away after twenty minutes, leaving the little hero in triumphant possession of his charge.

Among some species of monkeys several individuals will join together in overturning a stone for the possible ants’ eggs under it; and, when a burying beetle has found a dead mouse or bird, it goes and gets its companions to help it in the interment.^[3a] Crows show benevolence by feeding their blind and helpless companions, and monkeys adopt the orphans of deceased members of their tribe. Brehm saw two crows feeding in a hollow tree a third crow which was wounded. They had evidently been doing this for some time, for the wound was several weeks old. Darwin tells of a blind pelican which was fed upon fishes, which were brought to it by its friends from a distance of thirty miles.^[4a] The devotion of cedar-birds to each other and their kindness to all birds in distress are well known to every student of ornithology. Olive Thorne Miller tells of a cedar-bird that raised a brood of young robins that had been left orphans by the accidental killing of the parents. Weddell saw more than once during his journey to Bolivia that when a herd of vicunas were closely pursued the strong males covered the retreat of the weaker and less swift members of the herd by lagging behind and protecting them.^[3b]

A remarkable instance of altruism which he once saw exhibited by the king-crabs in a London aquarium is mentioned by Kropotkin in his work on ‘Mutual Aid a Factor in Evolution.’ One of these crabs had fallen on its back in a corner of the tank. And for one of these great creatures, with its saucepan carapace, to get on its back is, even in favourable circumstances, a serious matter. The seriousness was increased in this instance by an iron bar, which hindered the normal activities of the unfortunate crustacean. ‘Its comrades came to the rescue, and for one hour’s time I watched how they endeavoured to help their fellow-prisoner. They came two at once, pushed their friend from beneath, and after strenuous efforts succeeded in lifting it upright. But then the iron bar prevented them from achieving the work of rescue, and the crab again fell heavily on its back. After many attempts, one of the helpers went into the depth of the tank and brought two other crabs, who began with fresh forces the same pushing and lifting of their helpless comrade. We stayed in the aquarium for more than two hours, and, when leaving, came to cast a glance upon the tank. The work of attempted rescue still continued. Since I saw that I cannot refuse credit to the observation quoted by Dr. Erasmus Darwin that the common crab during the moulting season stations a sentinel, an unmolted or hard-shelled individual, to prevent marine enemies from injuring moulted individuals in their unprotected state.’ Walruses go to the defence of a wounded comrade when summoned by its cries for help. Romanes tells of a gander who acted as a guardian to his blind consort, taking her neck gently in his mouth and leading her to the water when she wanted to take a swim, and after allowing her to cruise for a time under his guidance and care, conducting her back home again in the same thoughtful manner. When goslings were hatched, this remarkable gander seemed to realise the inability of the mother to look after them, for he took charge of them as if they were his own, convoying them to the waterside, and lifting them carefully out of the ruts and pits with his bill whenever they got into difficulty.^[1b]

The disposition to go to the aid of a fellow in trouble is one of the most characteristic traits in the psychology of the swine. A single squeal of distress from even the scrawniest member of a swine herd will bring down on the one who causes this distress the hair-raising wrath of every porker within hearing. This trait has been considerably reduced by domestication, and in those varieties in which degeneracy has gone farthest it scarcely exists. But it is exceedingly strong in all wild hogs. Animals as low in the scale of development and as proverbially cold as snakes have been known, when educated and treated with kindness, to manifest considerable affection for their friends and masters. Nearly all domestic animals display a good deal of affection, not only to their young, but to adult members of their own kind and to their human masters. The devotion of the dog to man is without a parallel anywhere. It has been said that ‘the dog is the only thing on this earth that loves you more than he loves himself.’ When dogs become so much attached to their masters or mistresses that they pine and die on being separated from them, they show beyond any question that they have feelings which, in intensity, are not inferior to those possessed by the more highly developed men and women. And this has happened time after time.

A pathetic story of love and of its tragic close came last year out of the Maine woods. Two moose, who had been tracked all day by a couple of human tigers, were finally overtaken, when one of them fell pierced by two rifle-balls. The remaining moose, instead of dashing off into the forest, stood still, lowered its head, and sniffed at its fallen companion. Then, raising its antlers high into the air, it bellowed loudly. As the cry of the great creature echoed through the forest, it also fell at the discharge of the rifles. It was found on examination afterwards that the first moose was blind, and that the second one, which had neglected to leave it for safety, was its pilot.

My father once owned a cow who contracted a strong affection for my sister. This cow, who showed on many occasions and in many ways her highly developed emotional nature, would scarcely allow anyone else than my sister to milk her. She always presented herself to my sister as soon as she was let into the lot in order to be milked first, and she was so jealous of this privilege that if it were not accorded to her she would stand with her head down and give vent to her unhappiness in low moans. After she was milked she would follow her human friend around from one cow to another, in order to be as near her as possible. She knew my sister’s voice from that of everyone else, and would always low a response and come to her when called by name, even though she were a quarter of a mile away in the pasture. Romanes tells somewhere of a band of apes that were being pursued by dogs when a young ape was cut off from the rest and was about to be killed by the dogs. The chief of the band, seeing the peril of the young one, went deliberately back and rescued it.

Many animals show that they possess a rudimentary sense of humour by the pranks and tricks which they play on each other and on human beings. The monkey is the prince of nonhuman jokers, but dogs, cats, horses, elephants, and other animals have enough of this sense to have books written about it. A monkey has been observed to slyly pass his hand back of a second monkey and tweak the tail of a third one, and then composedly enjoy himself while the resentment of the injured monkey expended itself on the innocent middle one. Many monkeys enjoy entertaining their friends with grimaces, by carrying a cane, putting a tin dish on their heads, or other droll antics. These intelligent animals have a sufficiently high appreciation of the ludicrous to dislike ridicule. Like human beings, they can’t endure being laughed at, and get mad if they are made the victims of a joke. Romanes’ monkey was one day asked to crack a nut for the amusement of a visitor. The nut turned out to be a bad one, and the melancholy look of disappointment on the monkey’s face caused the visitor to laugh. The insulted monkey flew into a rage, and hurled the nut at the offending scoffer, then the hammer, and finally the coffee-pot which simmered on the grate fire.^[1c] Darwin tells of a baboon in the Zoological Gardens of London who always became infuriated every time his keeper took out a letter or book and read aloud to him. On one occasion when Darwin was present the baboon became so furious that he bit his own leg until it bled.^[4b]

The emotion variously known as shame, regret, repentance, and remorse, is not common among the non-human races. It is found sometimes in dogs and monkeys, and especially in educated anthropoids. But this emotion is exceedingly rare among savages, and is not at all universal even among civilised societies of men. Some animals manifest self-restraint, which is an exceedingly elite quality of mind, and one not so common as it might be even among the higher breeds of mankind. By restraint is meant the inhibition of a desire or instinct in the presence of circumstances tending to render the desire or instinct active—and this is obedience, and the beginning of morality. A dog that will not chase a hare in the presence of his master may do so in his absence. I taught my guinea-pigs to abstain from certain food in their presence which they wanted very much, and which they would have eaten if they had not been educated to let it alone. Sympathy is the most beautiful of all terrestrial emotions. It is manifested, sometimes to an exceedingly touching degree, by all the highest races of animals. No other instances than those already given can be mentioned here. It is sufficient to say that the difference between the savage—whose sympathies are so feeble that he has been known to knock his own child’s brains out for dropping a basket, and who puts his aged parents to death in order to avoid the burden of maintaining them, and whose sympathies seldom extend beyond his family or tribe—and civilised men and women, who feel actual pain when in the presence of those who suffer, and whose sympathies sometimes include all sentient creation, is much greater than that between the savage and many nonhuman animals. The frail, narrow, fantastic character of human sympathy is the most mournful fact in human nature. ‘Man’s inhumanity to man makes countless thousands mourn,’ and his inhumanity to not-men makes the planet a ball of pain and terror.

Volition is the power of the mind to act executively. Or, perhaps, it is the resultant of the impulses actuating a mind at any particular instant. Whatever volition is, it is the same thing in the insect as in the man. Non-human beings have been observed to pause and deliberate and to make wise and momentous decisions in the twinkling of an eye. A chased hare will decide to squat, to go straight ahead, or to do something else which the emergency demands, just as unmistakably as a human fugitive. In the sense of being the power to act differently from the manner in which a being actually does act, there is no such thing as freewill. The will of the worm is just as free as the will of the judge—not in the sense that it is as varied in the directions of its activity, but in the sense that the character of its activities is determined inevitably by the character of its antecedents. All will, whether human or non-human, invariably acts in the direction of the strongest motive, just as a stone or a river invariably moves, if it moves at all, in the direction of the strongest tendency or force. It is impossible that this should be otherwise. For, if the will in any case elects to overthrow this fact by arbitrarily discarding a stronger motive for a feebler, in the very motive of the election are concealed elements which transform the feebler motive into the stronger. All motion, voluntary and involuntary—the motion of bullets, beings, societies, and suns—takes place along the lines of least arrest. Every being is compelled to decide as he does decide and to act as he does act by the inherited tendencies of his own nature and the tendencies of the environment in which he exists. And if any being, after having passed through life, were again placed back at the beginning of life and endowed with the same nature as before, and were acted upon through life by surroundings identical with those he had previously met, he would act—that is, he would exercise his will—in precisely the same way in every particular as he had previously done. To deny these things is to assert that the conduct of living beings is without law, and that psychology and sociology are not sciences.

Non-human beings, all of the higher ones, have the same brain and nervous apparatus as man, and in their involuntary phenomena they closely resemble human beings. Aim a pretended blow near the eyes of a dog or a horse and it will wink involuntarily, just as a human being does. Sever the spinal cord of a man or a frog, and irritate the feet of each, and they will each manifest the same phenomena of reflex action, drawing their feet away each time from the stimulus.

Instinct and reason are forms of intelligence. Intelligence is the adaptation of acts to ends. Intelligence is manifested by all organisms, both plants and animals, and may be either conscious or unconscious. Plant intelligence and reflex action are forms of unconscious intelligence. Plant intelligence, or the adaptation of acts to ends by plants, is manifested by plants in the shifting of their positions when in need of light in order to obtain as large a supply as possible of the essential sunshine; in devices, such as traps and flowers, for utilising the juices and services of insects; in germinating and growing away from, instead of toward, the centre of the earth; in discriminating between this and that kind of food; and in a thousand other ways. Plant intelligence is all explicable in terms of chemistry and physics, and is, so far as is known, unaccompanied by consciousness. Reflex action is chemical affinity aided by the co-ordinating powers of nerve tissue. The vital processes of all animals, from the lowest to the highest, and many other highly habitual and highly essential operations, are carried on by reflex action. Reflex action in animals, like plant intelligence, is unconscious.

Instinct and reason are conscious. Instinct is inherited intelligence—intelligence manifested independently of, and prior to, experience and instruction. ‘Instinct,’ says Romanes, ‘is reflex action into which has been imported the element of consciousness’.^[5a] It is exhibited by the babe when it nurses the mother’s breast; by the chick when it pecks its way out through the shell of the egg; by animals generally, including man, in their solicitude for their young; by the parent bird in incubation; and by all beings when they seek food in obedience to the impulse of hunger. Our conception of the mental processes of non-humans is as yet very primitive, owing to our limited means of information and the erroneous influence on our judgments of traditional ways of thinking; and much that is attributed by us to instinct is not instinct at all, but is acquired by the young through education imparted by the elders. Parent birds have often been seen teaching their young ones to fly, and no doubt a good deal of the migratory acumen manifested by birds is nothing but custom and tradition handed down to each younger generation by the old and experienced. A large part of the knowledge of mankind (or what passes for knowledge) consists of habits and hobbies, customs and traditions, impressed upon each new generation by the generation which produced it. Each generation of men seems to feel that whenever it creates a new generation it has got to pile on to this new generation all of the fool notions which have been acquired from the past, amplified by its own inventions. And when we come to know other animals better, there is practically no doubt that we shall find that a large part of what we now call instinct and look upon as congenital will, on closer and more rational examination, be found to be nothing but the pedagogical effects of early environment. Professor Poulton, of Oxford, who has made many experiments on just-born birds, says that young chicks learn to fear the hawk and to interpret the oral warnings of the mother. Cats teach their young to play with their prey in that cruel manner so characteristic of all the Felidae, as I have myself observed more than once. A mother cat will carry a live mouse into the presence of her kittens and lie down and play with it, tossing it playfully into the air, poking it with her paw when it does not move, and arresting it when it starts to run away, the kittens all the time looking on, but never once attempting to take the mouse. After awhile the mother hands the captive over to the kittens, who go through the same performance one after another. After they have practised on it until the unfortunate creature is almost dead, the old cat will probably walk over to where the mouse is and eat it up. The whole thing is a school. The mouse is obviously not intended as food for the young, but to be used simply to impart instruction to them.

‘In popular writings and lectures some or all of the following activities of ant-life are commonly ascribed to instinct: The recognition of members of the same nest; powers of communication; keeping aphides for the sake of their sweet secretions; collection of aphid eggs in October, hatching them out in the nest, and taking them in the spring to the daisies on which they feed, for pasture; slave-making and slave-keeping, which, in some cases, is so ancient a habit that the enslavers are unable even to feed themselves; keeping insects as beasts of burden—e.g. a kind of plant-bug to carry leaves; keeping beetles, etc., as domestic pets; habits of personal cleanliness—one ant giving another a brush-up, and being, brushed up in return; habits of play and recreation; habits of burying their dead; the storage of grain and nipping the budding rootlet to prevent further germination; the habit of Texan ants of preparing a clearing around their nest, and, six months later, harvesting the ant-rice—a kind of grass of which they are particularly fond—even seeking and sowing the grain which shall yield the harvest; the collection by other ants of grass to manure the soil, on which there grows a species of fungus upon which they feed; the military organisation of the ecitons of Central America; and so forth. But to class all of these activities of the ant as illustrations of instinct is a survival of an old-fashioned method of treatment.

‘Suppose that the intelligent ant were to make observations on human behaviour as displayed in one of our great cities or in an agricultural district. Seeing so great an amount of routine work going on around him, might he not be in danger of regarding all this as evidence of hereditary instinct? Might he not find it difficult to obtain satisfactory evidence of the fact that this routine work has to some extent to be learned? Might he not say (perhaps not wholly without truth), “I can see nothing whatever in the training of these beings to fit them for their life-work. The training of their children has no more apparent bearing upon the activities of their after-life than the feeding of our grubs has on the duties of ant-life. They seem to fall into the routine of life with little or no preparatory training as the periods for the manifestation of the various instincts arrive. If learning thereof there be, it has so far escaped our observation. And such intelligence as their activities evince (and many of them do show remarkable adaptations to uniform conditions of life) would seem to be rather ancestral than of the present time, as is shown by the fact that many of the adaptations are directed rather to past conditions of life than to those which now hold good. In the presence of new emergencies to which their instincts have not fitted them, these poor creatures are often completely at a loss. We cannot but conclude, therefore, that, although acting under somewhat different and less favourable conditions, instinct occupies fully as large a space in the psychology of man as it does in that of the ant, while human intelligence is far less unerring and hence markedly inferior to our own.”

‘Are these views much more absurd than the views of those who, on the evidence which we at present possess, attribute all the activities of ant-life to instinct?’^[6]

Reason is the power of adapting means to ends which is acquired from experience or instruction. All animals that profit by experience, therefore, or that learn from instruction—that is, are teachable—exercise reason.

The Universal Kinship

The Universal Kinship

Preface

Contents

The Physical Kinship