The legend of Genghis Khan has echoed throughout history: A barbarian conqueror, fueled by bloodlust, terrorizing the civilized world. We have him and his Mongol horde traveling across Asia and Europe, insatiable, stopping at nothing to plunder, rape, and kill not just the people who stood in their way, but the cultures they had built. Then, not unlike his nomadic band of warriors, this terrible cloud simply disappeared from history, because the Mongols built nothing that could last.

Like all reactionary, emotional assessments, this could not be more wrong. For not only was Genghis Khan one of the greatest military minds who ever lived, he was a perpetual student, whose stunning victories were often the result of his ability to absorb the best technologies, practices, and innovations of each new culture his empire touched.