This book tells the surprising and little known story of how the earliest, most influential Christian churches of the East (China, India, and Middle East) became extinct - but not before becoming the dominant expression of Christianity for its first 1000 years and helping to shape both the Asia and the Christianity we know today. The Lost History of Christianity also reveals the full range from acceptance to persecution under Islamic rule and the surprising indebtedness of many Muslim practices and beliefs to these lost Christian communities.