"Philip Jenkin's book is a tour de force in historical retrieval and reconstruction, a work of scholarly restoration that strikes an overdue balance in the story of Christianity. Based on the neglected and overlooked record of developments east of the Roman Empire, the book explores significant continuities in Christian history. It is studded with insight, with the story presented in lively and lucid style."
- Lamin Sanneh, Professor of World Christianity and Professor of History, Yale University

"Philip Jenkins always writes well on very interesting topics. This time his topic is more than interesting—it is essential reading for anyone with any interest in the history of Christianity."
- Rodney Stark, Author of The Rise of Christianity

"Once again Philip Jenkins has expanded and enriched our understanding of Christianity by stretching his venturesome scholarship over time and space. In this highly readable and sobering exploration of how religions—including our own—grow, falter, and sometimes die, he adds a unique dimensions to present day religious studies in a voice and style that non-specialists can also appreciate."
- Harvey Cox, Hollis Professor of Divinity, Harvard University