Donald C. Abel is Professor of Philosophy at St. Norbert College in De Pere, Wisconsin. He holds a B.A. in Philosophy from Gonzaga University, an M.A. in Philosophy from Tulane University, a Ph.L. in Philosophy from St. Michael’s Institute, an M.Div. in Theology from Loyola University of Chicago, and a Ph.D. in Philosophy from Northwestern University. He is the author of Freud on Instinct and Morality (1989), Theories of Human Nature: Classical and Contemporary Readings (McGraw-Hill, 1992), Fifty Readings in Philosophy (McGraw Hill, 3d ed., 2008). He is the editor of Discourses (www.primisdiscourses.com), an electronic database of philosophy readings that is part of Primis, McGraw-Hill’s online resource for creating customized textbooks. Professor Abel has received two awards for excellence in teaching and an award for outstanding scholarship. He is a member of the American Philosophical Association, the American Catholic Philosophical Association, the Society for Ancient Greek Philosophy, and the Society for Philosophy and Psychology.