In Existential Psychoanalysis, a classic in the philosophical defense of freedom, individuality, and human dignity, Sartre criticizes modern psychology in general, and Freud's determinism in particular. Sartre's existential understanding of man, his rejection of naturalistic or mechanical determinism, and his affirmation of man's ultimate freedom and responsibility lead him to a brilliant and coruscating critique of Freudianism and to an outline of how an existential psychoanalysis might be developed.