""Jacob L. Moreno (1889-1974) was an early critic of Freud, wrote landmark works of Viennese expressionism, founded an experimental theater where he discovered Peter Lorre, influenced Martin Buber, and became one of the most important psychiatrists and social scientists of his time. A mystic, theater impresario, and inventor in his youth, Moreno immigrated to America in 1926, where he trained famous actors, introduced group therapy, and was a forerunner of humanistic psychology. As a social reformer he reorganized schools, prisons, and refugee camps. Moreno's methods have been adopted by improvisational theater, military organizations, educators, business leaders, and trial lawyers. His studies of social networks laid the groundwork for social media like Twitter and Facebook. Using original interviews with figures like Clay Shirky, Gloria Steinem, and Werner Erhard, written sources, and the author's own perspective growing up as the son of an innovative genius, Impromptu Man is the study of a great and largely unsung figure of the last century""--