According to Aristotle, character or ethos in tragedy is ’that which reveals what the moral choice is like’. This kind of ethos is what this book explores in Sophocles, by examining five tragedies in which moral choice is central to the course of the drama. These choices are made within the context of traditional Greek morality, which, amongst other things, expected one to help one’s friends and harm one’s enemies. Closely allied to these principles is the conception of justice as retaliation. This nexus of principles provides a pervasive ethical background to most of Greek literature and is of special significance for tragedy.

Greek popular thought is pervaded by the assumption that one should help one’s friends and harm one’s enemies. These fundamental principles surface continually from Homer onwards and survive well into the Roman period, and indeed to the present day, especially in international relations. They are firmly based on observation of human nature, which yields the conclusion that most human beings do in fact desire to help their friends and harm their enemies, and derive satisfaction from such behaviour. Thus Xenophon’s Socrates can count benefiting friends and defeating enemies as one of the things which bring the ’greatest pleasures’.