Sleeth, an emergency-room doctor turned environmental advocate, sold his big house and gave away half of what he owned; read a Sept. 22, 2006, interview in the Austin Chronicle. He traveled the country, talking at churches and colleges and encouraging congregations to “go green.”

Pete Wernick has a doctorate in sociology and wrote a chapter on parenting in a secular/religious marriage for the book Parenting Beyond Belief: On Raising Ethical, Caring Kids Without Religion (2007). He lives in Colorado.

Kroc Institute for International Peace Studies, based at the University of Notre Dame, is one of the world’s leading centers for the study of the causes of violent conflict and strategies for sustainable peace. Kroc Institute faculty and fellows conduct interdisciplinary research on a wide range of topics related to peace and justice.

Lawrence M. Krauss is a cosmologist and director of the Origins Project at Arizona State University, which explores questions ranging from the origin of the universe to the origins of human culture and cognition. His commentaries on matters of science and religion have appeared in The Wall Street Journal, including a Sept. 8, 2010, column, “Our Spontaneous Universe,” and one […]

Read about the Eco-Palm movement in a Religion News Service story, published April 8, 2006, in The Washington Post.

Jack David Eller is an assistant professor of anthropology at Community College of Denver and the author of Cruel Creeds, Virtuous Violence: Religious Violence Across Culture and History (October 2010) and Natural Atheism, Atheism Advanced: Further Thoughts of a Freethinker (2007). He also contributed two chapters to the anthology Atheism and Secularity (2009).

James A. Baker III Institute for Public Policy, based at Rice University in Houston, Texas, is one of the premier nonpartisan public policy think tanks in the country. Edward P. Djerejian is the founding director.

Keith Augustine is executive director of the Internet Infidels, a nonprofit educational organization based in Colorado Springs, Colo., that is dedicated to defending and promoting a naturalistic worldview on the Internet.

Beliefnet.org’s article that explores the meaning of suffering in different faiths.