The Oresteia is the only complete trilogy of Greek tragedy to survive, made up of Agamemnon, The Libation Bearers and The Eumenides. It follows the house of Atreus in Argos after the Trojan War, as one act of vengeance seems to demand another. The trilogy asks how a cycle of blood guilt can ever be ended, and it moves from the family to the gods and the city of Athens. First staged in 458 BCE, it is a central work of Western drama and political thought.