Anger, far from being only a personal emotion, often signals a breakdown in existing societal structures like the justice system. This does not mean we should uncritically submit to our angry impulses, but it does mean that anger can reveal larger issues in the world worthy of attention. If we banish anger from the socio-political landscape, we risk losing its insights. To defend that claim, I turn to a range of sources from ancient China and Greece—philosophy, poetry, drama, and political theory—that depict and analyze anger in a variety of situations and people. My basic claim is not that anger is simply “good” or “bad” but rather that it helps reveal and clarify our values, often pointing us towards real situations deserving of our ethic...