John Percival Postgate, FBA was an English classicist and academic. He was a fellow of Trinity College, Cambridge from 1878 until his death, and also taught at Girton College, Cambridge (1877–1909) and University College, London (1880–1908). Having been passed over for the Chair of Latin at the University of Cambridge, he was Professor of Latin at the University of Liverpool from 1909 to 1920. He was a member of the Postgate family.
John Percy Groves was a British author, librarian, and soldier. He wrote stirring adventure stories and information books for boys, all with a military theme, as well as military history, mostly about the Scottish regiments.
John Perkins is an American author. His best known book is Confessions of an Economic Hit Man (2004), in which Perkins describes playing a role in a process of economic colonization of Third World countries on behalf of what he portrays as a cabal of corporations, banks, and the United States government. The book's claims were met with skepticism and rebuttal by some involved parties. The book spent more than 70 weeks on the New York Times bestseller list.
John Perry Barlow was an American poet, essayist, cattle rancher, and cyberlibertarian political activist who had been associated with both the Democratic and Republican parties. He was also a lyricist for the Grateful Dead, a founding member of the Electronic Frontier Foundation and the Freedom of the Press Foundation, and an early fellow at Harvard University's Berkman Klein Center for Internet & Society.
John Philip Kemble was a British actor. He was born into a theatrical family as the eldest son of Roger Kemble, actor-manager of a touring troupe. His elder sister Sarah Siddons achieved fame with him on the stage of the Theatre Royal, Drury Lane. His other siblings, Charles Kemble, Stephen Kemble, Ann Hatton, and Elizabeth Whitlock, also enjoyed success on the stage.
John Philoponus, also known as John the Grammarian or John of Alexandria, was a Byzantine Greek philologist, Aristotelian commentator, Christian theologian and an author of a considerable number of philosophical treatises and theological works. He was born in Alexandria. A rigorous, sometimes polemical writer and an original thinker who was controversial in his own time, John Philoponus broke from the Aristotelian–Neoplatonic tradition, questioning methodology and eventually leading to empiricism in the natural sciences. He was one of the first to propose a "theory of impetus" similar to the modern concept of inertia over Aristotelian dynamics.
