In the history of psychoanalysis, the theory of drives was the initial comprehensive interpretive framework. This was to be replaced first by the structural theory, then by ego psychology. Currently, theories of the self and of narcissism predominate. Thomä regards the tide of the "self" concept (which Freud used interchangeably with "ego" and "person") as a holistic reaction against the ego-psychological division of personal wholeness into functions. He points out that the "self," which has been presented as close to experience, is a theoretical construct and warns agains reifications in the theory of Kohut and his students.