A unitary theory of psychoanalysis in the place of the present pluralistic theoretical culture is presented. Although alternative theoretical systems to the basic theory discovered and expanded by Freud have been present since the beginnings of psychoanalysis, their modern forms took root in the late 1960s and received quasi-official sanction and status with the posing of the question “One Psychoanalysis or Many?” in the Presidential Address of the International Psychoanalytic Association in 1988 (R. Wallerstein, 1988), to which the answer automatically given was “many.” Proposed to this question is the answer of “one,” a unified, composite theory of psychoanalysis that is to be distinguished from nonpsychoanalytic theories of human behavior. The reasoning and the contents behind such an approach are described.