Rachel Singpurwalla (Ph.D. Colorado) is an Associate Professor of Philosophy. Her area of specialization is ancient Greek philosophy, especially Plato's moral psychology, ethics, and politics. She is currently working on a series of papers on Plato's Republic, with the ultimate aim of explicating his main line of argument for the claim that justice pays. She focuses in particular on Plato's notions of friendship, virtue, beauty, and happiness, and the relationships among these. She is also writing a series of papers on Plato's moral psychology, and especially his conception of rational and non-rational motivation. Her research has been supported by Harvard's Center for Hellenic Studies and the National Endowment for the Humanities.