Covered 2000 miles of Andes Mountains. Used expansionist policy, professional army, bureaucracy, unified language, and complex system of roads to connect empire. Human labor cause no animals. Mita system made peasants work the land or construction projects of government. Peasants gave part of harvest to government for famine relief. Women were very free in Incan society: worked in the fields, weaved cloth, cared for the household, played role in religion, and could inherit land. No private property because they believed the ruler descended from the Sun god so he owned everything. Excellent builders, stone cutters, and miners. Kept data using quipu, knotted strings