William O'Neill, SJ, is a professor emeritus of social ethics at the Jesuit School of Theology of Santa Clara University. He held the Jesuit Chair at Georgetown University from 2003-04 and has served on the editorial board of the Journal of the Society of Christian Ethics and the board of directors of Theological Studies. He is the author of numerous articles on moral theology and ethics and The Ethics of Our Climate: Hermeneutics and Ethical Theory (Georgetown University Press, 1994). He is currently serving as a member of the Mission and Identity Task Force for the Jesuit Refugee Service, stationed in Nairobi, Kenya.