Watching the tragedy unfold in Israel and Palestine has sometimes felt like reading the Oresteia backwards. A trilogy of plays by Aeschylus, written in the fifth century BC, the Oresteia tells of the transformation of ancient Greece from a society rooted in blood and revenge into one shaped by justice. The Oresteia begins with the return home from the Trojan war of Agamemnon, the leader of the triumphant Greeks. He is brutally murdered by his wife, Clytemnestra, in furious revenge for his having ritually sacrificed their daughter Iphigenia on the eve of conflict to placate the gods. To avenge his...