" You see, the ancestral horse died out here—well, in the ‘here’ that is my real-life home, but not in the world of Temilún. When the great empires of the Americas arose in the real world—the Toltec, Aztec, Mayan, Inca, our own Muisca—they had several handicaps the civilizations of the Tigris Valley or the Mediterranean did not have—slower communications, no large wagons or sledges since there were no animals capable of hauling them, less need for broad flat roads, hence less pressure to develop the wheel, and so on.” He began pacing again, but this time with an air of happy energy. “In the real world, the Spanish came to the Americas and discovered them ripe for plucking. Only a few hundred men with guns and horses subjugated two continents. Think of that! So I built America again. But this time the horse did not die out.” He took off his feathered crown and set "
― Tad Williams , City of Golden Shadow (Otherland, #1)