Aeschylus' Oresteia is the only extant trilogy of Greek drama. Alongside the Parthenon, the Oresteia is considered one of the two greatest 'monuments' to the Golden Age of Athens. In this trilogy - The Agamemnon, The Libation Bearers, and The Eumenides - Aeschylus dramatizes a rite of passage from savagery to civilization. Over the course of the narrative, the ancient law of blood is overcome by a new civic law, sanctioned by the gods. The word "justice" (Dikê) is used more often in the Oresteia than in any other Greek tragedy. Through these verses, we witness a struggle from the hazy, mysterious world of archaic Greece, governed by gods who behaved capriciously and unpredictably, into the clarity of civic life, in which human beings are empowered to make the contextual decisions of governance.

Michael D. Davis, lectures on Philosophy of Tragedy:

Episode art: John Singer Sergeant - Orestes Pursued by the Furies