Professor Thomas Carson explains Aristotle’s theory of friendship and shows how it sheds light on our lives and our relationships with other people. He addresses the definition, importance, and types of friendship, and why Aristotle thinks that some kinds of friendships are better than others. Aristotle discusses friendships with morally good people, friendships with morally bad people, the obligations created by friendships, and the importance of “concord” in friendships. According to Aristotle, two people have concord if they share the same views and values about matters of common interest and agree about how to work together toward common goals.