Brian Davies is Professor of Philosophy at Fordham University, New York, where he has taught since 1995. He previously taught at Oxford University, U.K. In 2005 he received the American Catholic Philosophical Association's Aquinas Medal for Eminence in Philosophy. His research interests are in medieval philosophy and philosophy of religion. He is currently the Editor of Oxford University Press's 'Great Christian Thinkers' series. Eleonore Stump is the Robert J. Henle, SJ, Professor of Philosophy at Saint Louis University, where she has taught since 1992. She is past president of the Society of Christian Philosophers, the American Catholic Philosophical Association, and the American Philosophical Association, Central Division. She presented the Gifford Lectures in Aberdeen, Scotland (2003), the Wilde lectures at Oxford (2006), and the Stewart lectures at Princeton (2009). In 2004, she received the Robert Foster Cherry Award for Great Teaching from Baylor University. Her research interests are in medieval philosophy, philosophy of religion, and contemporary metaphysics.