The Rev. Billy Wilson runs World Impact, an evangelism television ministry based in Cleveland, Tenn.

J. Lee Grady is contributing editor for Charisma Magazine, one of the leading periodicals of the Pentecostal community, and part of the Charisma Media group that produces magazines, books, other literature and ministry aids for Pentecostals. A veteran journalist, Grady is a knowledgeable and well-respected commentator on the Pentecostal scene.

David Daniels, a professor at McCormick Theological Seminary in Chicago, is an expert in African Pentecostalism.

Timothy Samuel Shah is associate director of the Religious Freedom Project at the Berkley Center for Religion, Peace and World Affairs and is visiting assistant professor in the government department at Georgetown University in Washington, D.C. In 2005 Shah taught a course on Pentecostalism and globalization for the annual summer school program at Boston University’s Institute on […]

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).

Arlene Sánchez-Walsh is a religious studies professor at Azusa Pacific University in Azuza, California. She is an authority on Latino evangelicals, and her current research is on the rise of nonbelief among Latinos and Latinas. Her books include Latino Pentecostal Identity: Evangelical Faith, Self and Society.  

Robin D. Perrin, professor of sociology at Pepperdine University in Malibu, Calif. Specializes in sociology of religion. Has written numerous articles on religion including “Examining the Sources of Conservative Church Growth: Where are the New Evangelical Movements Getting Their Numbers?” for the Journal for the Scientific Study of Religion in 1997.

Bob Hyatt is a pastor and elder at the Evergreen Community (Motto: “Life’s short, why not apply for an extension?”), a church plant that was founded in 2004 and which meets in a pub in Portland, Ore. Evergreen believes it is important to give the “unchurched” and the “formerly churched” a place to belong before they believe. […]

Rodney Harrison is vice president for institutional effectiveness, dean of online education, director of doctoral studies and associate professor of Christian education at Midwestern Baptist Theological Seminary in Kansas City, Mo. He is a veteran church planter, having started churches in Minnesota, California and the Dakotas.