Mark Timmons is Professor of Philosophy at the University of Arizona. His research interests include metaethics, normative ethical theory, and Kant’s ethics. He is author of Morality without Foundations (Oxford University Press), Moral Theory: An Introduction (Rowman and Littlefield) and he is currently writing book on Kant’s final work in ethics, The Doctrine of Virtue (under contract with Oxford University Press). He and Terry Horgan have written extensively in metaethics, including on topics related to moral phenomenology. Some of his writings on Kant’s ethics appear in his collection, Significance and System: Essays on Kant’s Ethics (Oxford University Press). He is editor or co-editor of many collections; most recently The Kantian Mind (Routledge, forthcoming) and Handbook of Moral Epistemology (Routledge). Timmons also edits the annual Oxford Studies in Normative Ethics.