1898-1979. German political philosopher, in the USA from 1934; his theories combining Marxism and Freudianism influenced radical thought in the 1960s. His books include One-Dimensional Man 1964. Marcuse preached the overthrow of the existing social order by using the system's very tolerance to ensure its defeat; he was not an advocate of violent revolution. A refugee from Hitler's Germany, he became professor at the University of California at San Diego 1965.