The gods worshiped by the Greeks played a large part in decided what is right and wrong. In the Iliad A Trojan, Paris ran off with the wife of Agamemnon’s brother who was a king. In response Agamemnon got the blessing from Zeus to restore justice his brother by starting a war with Troy. Another example of the sense of justice in the Iliad and Oresteia was when Clytemnestra killed her husband with the claim she was enforcing justice due to Agamemnon for killing their innocent daughter.
“By the justice I exacted for my child, by Ruin, and the Fury in whose honor I sacrificed this man. (Oresteia, 57)
This incident shaped much of the debate in the Oresteia for what was right and wrong in their morals for killing. On one hand, killing another family member is the worst thing you can do, but Clytemnestra was just trying to get justice for her slaughtered daughter, which causes herself to get murdered. Justice in this time period was a lot of pay back for something someone did to someone close to