The "marvelous" (Reza Aslan, bestselling author of Zealot ), New York Times bestselling story of how Christianity became the dominant religion in the West. How did a religion whose first believers were twenty or so illiterate day laborers in a remote part of the empire became the official religion of Rome, converting some thirty million people in just four centuries? In The Triumph of Christianity , early Christian historian Bart D. Ehrman weaves...