He kills Abel, the second-born. Many have seen the movie, but few have read the book, a much deeper account. Brother will betray brother. Random House, 1996. Sulloway argues that rebelliousness is statistically discernable by Darwinian niche.
Darwinian niche means sibling order, firstborn versus later-born.
Freudian nonsense that there is an Oedipus Complex. Freud's notion of the Oedipus complex makes little sense in a Darwinian world. Offspring are not trying to kill one parent in order to take sole possession of the other. Childhood is about maximizing parental investment, not reducing it by half. The basic conflict originates between siblings, vying for parental investment.