The objective of How Did Christianity Begin? is to present two contrasting perspectives on the history of early Christianity. The contrast is evidently sharp as one co-author comes from a conservative Christian background (Michael Bird), while the other co-author (James Crossley) approaches the matter from a secular standpoint. The volume works sequentially through Christian origins and addresses various topics including the historical Jesus, the resurrection of Jesus, the Apostle Paul, the Gospels, and the early church. Each author in turn examines these subjects and lays out his historical arguments concerning their origin and meaning.