“In twenty-five years, the Mongol army subjugated more lands and people than the Romans had conquered in four hundred years. Genghis Khan, together with his sons and grandsons, conquered the most densely populated civilizations of the thirteenth century. Whether measured by the total number of people defeated, the sum of the countries annexed, or by the total area occupied, Genghis Khan conquered more than twice as much as any other man in history. The hooves of the Mongol warriors' horses splashed in the waters of every river and lake from the Pacific Ocean to the Mediterranean Sea. At its zenith, the empire covered between 11 and 12 million contiguous square miles, an area about the size of the African continent and considerably larger than North America, including the United States, Canada, Mexico, Central America, and the islands of the Caribbean combined. It stretched from the snowy tundra of Siberia to the hot plains of India, from the rice paddies of Vietnam to the wheat fields of Hungary, and from Korea to the Balkans. The majority of people today live in countries conquered by the Mongols; on the modern map, Genghis Kahn's conquests include thirty countries with well over 3 billion people. The most astonishing aspect of this achievement is that the entire Mongol tribe under him numbered around a million, smaller than the workforce of some modern corporations. From this million, he recruited his army, which was comprised of no more than one hundred thousand warriors — a group that could comfortably fit into the larger sports stadiums of the modern era.
“In American terms, the accomplishment of Genghis Khan might be understood if the United States, instead of being created by a group of educated merchants or wealthy planters, had been founded by one of its illiterate slaves, who, by the sheer force of personality, charisma, and determination, liberated America from foreign rule, united the people, created an alphabet, wrote the constitution, established universal religious freedom, invented a new system of warfare, marched an army from Canada to Brazil, and opened roads of commerce in a free-trade zone that stretched across the continents. On every level and from any perspective, the scale and scope of Genghis Khan's accomplishments challenge the limits of imagination and tax the resources of scholarly explanation.