Oskar Maria Graf war ein deutsch-amerikanischer Schriftsteller. Seine Romane Der Abgrund (1936) und Anton Sittinger (1937) zählen zu den „scharfsinnigsten literarischen Analysen des Verhältnisses von Kleinbürgertum und Faschismus“.
Leopold Hermann Oskar Panizza war ein deutscher Psychiater, Schriftsteller, Satiriker, Reformorthograph, Psychiatriekritiker, Religionskritiker und Publizist.
Ossip Schubin, Pseudonym für Aloisia (Lola) Kirschner, war eine deutschsprachige böhmische Schriftstellerin, die bevorzugt das Salon- und Gesellschaftsleben ihrer Zeit schilderte.
Oswald Arnold Gottfried Spengler was a German polymath, whose areas of interest included history, philosophy, mathematics, science, and art, as well as their relation to his organic theory of history. He is best known for his two-volume work, The Decline of the West, published in 1918 and 1922, covering human history. Spengler's model of history postulates that human cultures and civilizations are akin to biological entities, each with a limited, predictable, and deterministic lifespan.
Otis Adelbert Kline born in Chicago, Illinois, USA, was a songwriter, an adventure novelist and literary agent during the pulp era. Much of his work first appeared in the magazine Weird Tales. Kline was an amateur orientalist and a student of Arabic, like his friend and sometime collaborator, E. Hoffmann Price.
