Mark Timmons is Professor of Philosophy at the University of Arizona. He is author of Morality with Foundations: A Defense of Ethical Contextualism (Oxford, 1999), and Moral Theory: An Introduction (Rowman & Littlefield, 2002). He is editor of Kant's Metaphysics of Morals: Interpretative Essays (Oxford, 2002), Conduct and Character: Readings in Moral Theory, 5th ed. (Wadsworth, 2006), and Disputed Moral Issues, Second Edition (Oxford, 2011). He is co-editor of: Metaethics after Moore (Oxford, 2006), Moral Knowledge? Essays in Moral Epistemology (Oxford, 1996), of Rationality and the Good: Critical Essays on the Ethics and Epistemology of Robert Audi (Oxford, 2007), and Knowledge, Nature and Norms (Cengage-Wadsworth, 2008).