In 1492, about sixty million people lived in Europe, fifteen million fewer than lived in the Americas. They lived and were ruled in villages and towns, in cities and states, in kingdoms and empires. They built magnificent cities and castles, cathedrals and temples and mosques, libraries and universities. Most people farmed and worked on land surrounded by fences, raising crops and cattle and sheep and goats. “Be fruitful, and multiply, and replenish the earth, and subdue it,” God tells Adam and Eve in Genesis, “and have dominion over the fish of the sea, and over the fowl of the air, and over