Oedipus complex desire (libido) for mother, and aggression towards father, student–collaborator Carl Jung counter-proposed that girls experienced desire for father and aggression towards mother via the Electra complex—derived from the 5th-century BC Greek mythologic character Electra, who plotted matricidal revenge with Orestes, her brother, against Clytemnestra, their mother, and Aegisthus, their stepfather, for their murder of Agamemnon, her father (cf. "Electra", by Sophocles). Moreover, because it is native to Freudian psychology, orthodox Jungian psychology uses the term "Oedipus complex" only to denote a boy's psychosexual development. In classical Freudian psychology the super-ego, "the heir to the Oedipus complex", is formed as the
Oedipus complex "disappointment over a woman" (object drives) or "a mishap in social relations with other men" (ego drives) is the cause of regression or symptom formation. Triangulation can take place with a romantic rival, for a woman, or with a work rival, for the reputation of being more potent. When Sigmund Freud (1856–1939) proposed that the Oedipus complex was psychologically universal, he provoked the evolution of Freudian psychology and the psychoanalytic treatment method, by collaborators and competitors alike. In countering Freud's proposal that the psychosexual development of boys and girls is equal, i.e. equally oriented – that each initially experiences sexual