The reasons for the unfortunate ending of Aeschylus' Agamemnon go back the the curse on the House of Atreus. A more proximate cause is that Agamemnon sacrificed his daughter Iphegenia at Aulis in order to obtain favourable winds for the Trojan fleet. While Agamemnon is a Troy, his wife Clytemnestra takes a male relative Aigisthus as consort in order to rule more effectively, arguing that Agamemnon has abrogated his kingly responsibilities by staying so long at Troy. When Agamemnon returns from Troy, Clytemnestra invokes these reasons as justification for killing her husband. The actual murder takes place offstage, but we here Agamemnon shouting from offstage that he has been stabbed, and the Clytemnestra explains to us her reasons.