Grant Wacker is professor emeritus of Christian history at Duke University Divinity School in Durham, N.C. He specializes in the history of evangelicalism, Pentecostalism and world missions and is the author of Heaven Below: Early Pentecostals and American Culture.

Cecil M. “Mel” Robeck Jr. is a professor of church history and ecumenics and director of the David J. DuPlessis Center for Christian Spirituality at Fuller Theological Seminary in Pasadena, Calif. Robeck is a leading scholar and commentator on Pentecostalism and author of The Azusa Street Mission and Revival, (Thomas Nelson Publishers, 2006).

Mark Perakh is a professor emeritus of physics at California State University, Fullerton. He is author of Unintelligent Design (Prometheus Books, 2004).

See a timeline of the Azusa Street revival.

John Schneeberger is with the Bitterroot Human Alliance in Hamilton, Mont., and advocated against the inclusion of intelligent design in Darby public schools.

The Encyclopedia of Religion and Society entry on Pentecostalism gives an overview of the history and issues facing Pentecostalism.

Richard Weikart is an associate professor of history at California State University, Stanislaus, and a fellow at the Discovery Institute’s Center for Science and Culture. He has lectured on the subject “Does Darwinism Devalue Human Life?”

John Mark Reynolds is the president of The Saint Constantine School. Dr. Reynolds is a senior fellow of humanities at The King’s College in New York City. He is also a fellow at the Discovery Institute’s Center for Science and Culture. He was also the founder and director of the Torrey Honors Institute.

Paul Chien is a professor emeritus of biology at the University of San Francisco, a Jesuit university, and a senior fellow at the Discovery Institute’s Center for Science and Culture.