JOHN D. WOODBRIDGE (Wheaton College; Michigan State University; Trinity Evangelical Divinity School; University of Toulouse, France) is research professor of Church History and the History of Christian Thought at Trinity Evangelical Divinity School in Deerfield, Illinois. He has taught at Trinity since 1970. He previously served as a senior editor of Christianity Today. He is author of a number of books including The Mark of Jesus: Loving in a Way the World Can See, Ambassadors for Christ, and Great Leaders of the Christian Church. Dr. Woodbridge and his wife, Susan, reside in Lake Forest, Illinois, and have three children.