Best selling author, Bart Ehrman, was raised a dyed in the wool evangelical who studied at Moody Bible Institute, graduated from Wheaton College, and later received a PhD from Princeton Theological Seminary. At a very basic level, something happened to turn him into an avowed agnostic who now challenges problematic doctrines of Christianity, both in his books and in the classroom, where he teaches religious studies at the University of North Carolina at Chapel Hill.