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 unconscious guilt. Freud believed that the Oedipal sentiment has been inherited through the millions of years it took for humans to evolve from apes. He based this on his analysis of his feelings attending the play, his anecdotal observations of neurotic or normal children, and on the fact that " Oedipus Rex" was effective on both ancient and modern audiences. (He also claimed that the play "Hamlet" "has its roots in the same soil as "Oedipus Rex"", and that the differences between the two plays are revealing. "In ["Oedipus Rex"] the child’s wishful fantasy that underlies it is brought into