This is a brief summary of Freud's additional views on the Oedipus complex—found in the New Introductory Lectures on Psychoanalysis—and its implications for the study of the psychosexual development of the girl.

Servadio also discusses Freud's earlier concepts of aggressive drives and seems to believe that Freud, before 1920, regarded aggression as an essential constituent of the ego instincts and ascribed the aggression inherent in the Oedipus complex to the ego and not to the id. Furthermore, Servadio adheres to Melanie Klein's findings that superego formation begins in earliest childhood, before the development of the Oedipus complex, as Freud describes it. Of course, everyone agrees that the phenomenon of identification commences at almost the onset of life, but whether these early and necessary identifications already form the superego is questionable.