“Cicero’s indispensable dialogue, presented here in a lively new translation, is one of the most important treatments of friendship in the ancient world—and not only the ancient world. Cicero balances a poignant picture of the deep love of genuine friends with a shrewd analysis of practical and political relationships. This work illuminates friendship today and highlights the changes that, like everything with a history, it has undergone with time.”—Alexander Nehamas, author of On Friendship