Shelly Kagan is Clark Professor of Philosophy at Yale. After receiving his B.A. from Wesleyan University in 1976, and his Ph.D. from Princeton University in 1982, he taught at the University of Pittsburgh and the University of Illinois at Chicago before coming to Yale in 1995. He is the author of the textbook Normative Ethics, which systematically reviews alternative positions concerning the basic rules of morality and their possible foundations, and The Limits of Morality, which challenges two of the most widely shared beliefs about the requirements of morality.
More info: http://philosophy.yale.edu/kagan