If any proof were needed that this system of religion is the natural outgrowth of human nature in certain conditions of barbarism, it would be furnished by the universal prevalence of Shamanism in north-eastern Siberia among so many diverse tribes of different character and different origin.

During the rise of the Mongols this religion, which closely resembled the shamanism of the ancient Mongols, spread in Mongolia, and through the Mongols it made great progress in China, where it had been insignificant until their time.