Thomas E. Hill Jr. is Kenan Professor of Philosophy at the University of North Carolina, Chapel Hill. He has also taught at the University of California at Los Angeles and has held visiting appointments at Stanford University and the University of Minnesota. He has written widely on ethics and political philosophy. Books published previously include 'Human Welfare and Moral Worth' (2002), 'Respect, Pluralism and Justice: Kantian Perspectives' (2000) and 'Dignity and Practical Reason in Kant's Moral Theory' (1992). Arnulf Zweig currently teaches at Baruch College, City University of New York. He is Professor Emeritus of Philosophy at the University of Oregon and has held visiting appointments at Harvard and M.I.T. He is the editor and translator of Kant's correspondence and has published articles in the philosophy of law, ethics and the history of philosophy. Books published previously include 'Kant: Correspondence' (1999) and Kant: Philosophical Correspondence, 1759-1799 (1967, 1970).