The Triumph of Christianity: How a Forbidden Religion Swept the World is a book by American New Testament scholar Bart D. Ehrman.

Published on February 13, 2018, by Simon & Schuster, the book concerns the history of early Christianity and its spread throughout the world.

[1] Bob Duffy of the Washington Independent Review of Books wrote that The Triumph of Christianity "remains solidly grounded in first-rate scholarship.

And although a few loony emperors do lurk about and the (very) occasional persecution arises, the reader in search of the dramatic, the sentimental, or the miraculous is likely to find scant fulfillment here.

Like a good college lecture class, his book offers both a wealth of historical information and, to make sense of it all, a few plausible theories – including his own.