latency stage of reduced sexual interest and activity (from the age of five to puberty, approximately), they leave, to a greater or lesser extent, a "perverse" and bisexual residue which persists during the formation of adult genital sexuality. Freud argued that neurosis and perversion could be explained in terms of fixation or regression to these phases whereas adult character and cultural creativity could achieve a sublimation of their perverse residue. After Freud's later development of the theory of the Oedipus complex this normative developmental trajectory becomes formulated in terms of the child's renunciation of incestuous desires under the fantasised threat of (or fantasised fact of, in the case of the girl) castration. The "dissolution" of the Oedipus complex is then achieved when the child's rivalrous identification with the parental figure is transformed into the pacifying identifications of the Ego ideal which assume both similarity and difference and acknowledge the separateness and autonomy of the other. Freud hoped to prove that his model was universally valid and turned to ancient mythology and contemporary ethnography for comparative material arguing that totemism reflected a ritualized enactment of a tribal Oedipal conflict. Id, ego, and super-ego Freud proposed that the human psyche could be divided into three parts: Id, ego, and super-ego. Freud discussed this model in the 1920 essay Beyond the Pleasure Principle, and fully elaborated upon it in The Ego and the Id (1923), in which he developed it as an alternative to his previous topographic schema (i.e., conscious, unconscious and preconscious). The id is the unconscious portion of the psyche that operates on the "pleasure principle" and is the source of basic impulses and drives; it seeks immediate pleasure and gratification. Freud acknowledged that his use of the term Id (das Es, "the It") derives from the writings of Georg Groddeck. The super-ego is the moral component of the psyche. The rational ego attempts to exact a balance between the impractical hedonism of the id and the equally impractical moralism of the super-ego; it is the part of the psyche that is usually reflected most directly in a person's actions. When overburdened or threatened by its tasks, it may employ defence mechanisms including denial, repression, undoing, rationalization, and displacement. This concept is usually represented by the "Iceberg Model". This model represents the roles the id, ego, and super-ego play in relation to conscious and unconscious thought. Freud compared the relationship between