Roger S. Gottlieb is Professor of Philosophy at Worcester Polytechnic Institute. He is the author or editor of fourteen books and more than 50 articles on political philosophy, religious life, the Holocaust, environmentalism, and disability, including A Greener Faith: Religious Environmentalism and Our Planet's Future (OUP 2006), This Sacred Earth: Religion, Nature, Environment (second edition, 2003) and Joining Hands: Politics and Religion Together for Social Change (2002). He writes a column for the national magazine Tikkun and serves on the editorial boards of four scholarly journals.