Rene Girard's brilliant analysis of Oedipus Rex: it is the *similarity* between Oedipus, Creon, & Tiresias that underlies the chain-reaction of violence.
& how rule agst shedding blood and the rule to take revenge are the same rule ("it's because they hate violence that men must seek vengeance")
& how the institution of sacrifice has role of maintaining this distinction in the absence of a judicial system.
And so much more. It's truly great.