Alvin Plantinga is John A. O’Brien Professor of Philosophy at the University of Notre Dame. He is the author of “The Dawkins Confusion: Naturalism ad absurdum,” a review of Richard Dawkins’ The God Delusion, in the March/April 2007 issue of Books & Culture. Plantinga has written several articles about faith and science

Penny Edgell is a professor in sociology at the University of Minnesota and lead author of a 2006 study on the social acceptance of atheists in America. She is beginning new research on the moral communities of those who aren’t traditionally religious. She wrote Religion and Family in a Changing Society.

Robert Altemeyer is a retired associate professor of psychology at the University of Manitoba. He is the co-author of Atheists: A Groundbreaking Study of America’s Nonbelievers (2006) and Amazing Conversions: Why Some Turn to Faith and Others Abandon Religion (1997).

James A. Beverley is a theologian and professor of Christian thought and ethics at Tyndale University College and Seminary in Toronto. He is the author of The God Solution: A Reply to the God Delusion. He is also an expert on Rev. Sun Myung Moon and the fiction of Dan Brown.

Julian Baggini is a British philosopher, writer and blogger who is the author of Atheism: A Very Short Introduction. He is also the founder of the magazine and website The Philosophers’ Magazine.

Erik J. Wielenberg is an associate professor of philosophy at DePauw University in Greencastle, Ind. He is the author of Value and Virtue in a Godless Universe, which argues that life has meaning and a moral structure even if God does not exist.

Alister McGrath is a former atheist and now an evangelical Christian and a theology professor at the University of Oxford’s Harris Manchester College. He is a prolific writer and public apologist for Christianity and is author of several books, including The Twilight of Atheism: The Rise and Fall of Disbelief in the Modern World, In the Beginning: […]

William Lane Craig is a research professor in philosophy at Biola University in La Mirada, Calif. He lives in Atlanta, Ga. Craig wrote a chapter, “Theistic Critiques of Atheism,” for the Cambridge Companion to Atheism.

Susan Jacoby is the New York-based author of Freethinkers: A History of American Secularism.