Writing in the fourth century B.C., in an Athens that had suffered a humiliating defeat in the Peloponnesian War, Plato formulated questions that have haunted the moral, religious, and political imagination of the West for more than 2,000 years- what is virtue? How should we love? What constitutes a good society? Is there a soul that outlasts the body and a truth that transcends appearance? What do we know and how do we know it? Plato's inquiries...