Dr. Bart D. Ehrman is a New Testament scholar, textual critic, an expert on early Christianity, a professor and the chairman of Religious Studies at the University of North Carolina at Chapel Hill and the author of "Misquoting Jesus: The Story Behind Who Changed the Bible and Why." Ehrman attempts to discern, as near as possible, the original wording of the gospels, epistles, and other ancient texts. He champions the thesis that early Christians, as they developed a single, orthodox doctrine, altered the Biblical texts in order to make them more uniform and in line with changing beliefs.
Ehrman was an evangelical Christian as a teenager, and was very interested in what he thought was God's true message. However, Dr. Ehrman's subsequent close analysis of the Bible and research into the field of textual criticism destroyed his faith in the Bible.
Ehrman is now an agnostic, and is a prime example of someone who has looked at Christianity deeply but found it to be faulty as a religion.
This video presentation was recorded at Stanford University. Total length: one hour, 40 minutes.