The so called 'Kingdom of Prester John' was a Christian power thought to exist in Central Asia at the time of the twelfth-century crusades. At a deeper level, for the steppe peoples it constitutes a distant dynamic which led to the world-shattering rise of Mongol power under Chinggis (Genghis) Khan. The book ranges widely in subject matter, space and time. Christian history and ecological, demographic, social and economic history are all interwoven...