David Rapaport surveys, evaluates, and integrates the general theory of psychoanalysis, and reviews the series of models proposed by Freud to account for thought, affect, and action. He extracts assumptions and propositions about the nature of man from the major theoretical contributions of psychoanalysis. The formal properties of psychoanalysis as a theory are considered and weighed in the perspective of other theories. Problems of quantifying and measuring psychoanalytic concepts are discussed as well as the kinds of evidence that test the theory's propositions. It clears the ground for a reconsideration of psychoanalysis as a general theory of behavior, as well as a theory of psychopathology and therapy, and points the way for future growth.