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.