The document discusses the origins and key elements of Greek tragedy according to Aristotle. It examines how Aristotle defined tragedy, the concept of catharsis, and the tragic hero as being neither thoroughly good nor evil but flawed. It then analyzes how Arthur Miller's play "All My Sons" follows the model of Greek tragedy, with Joe Keller as the tragic hero whose fatal flaw or hubris leads to his downfall. Finally, it discusses how later playwright Henrik Ibsen updated Greek tragic themes with a realistic style and social critique through complex characters.