The Inca Empire (Tawantinsuyu, 'Four Regions Together') was the largest political entity in the pre-Columbian Americas and one of the most sophisticated administrative achievements in world history — accomplished without wheels, writing (in the conventional sense), iron, or large domesticated draft animals.

The Inca state administered a territory of approximately 2 million square kilometers, from modern Colombia to central Chile, through a system of regional governors (apos), mit'a labor taxation (in-kind service rather than tribute in goods), and an elaborate road network. The Andean road system — approximately 40,000 km of maintained roads at the empire's height — traversed some of the world's most extreme terrain through ingenious engineering: suspension bridges, stairways cut into cliff faces, causeways over wetlands.

The quipu — knotted string records using different colors, knot types, and arrangements — was the Inca administrative recording system. Quipu specialists (quipucamayocs) could record numerical data with high precision; whether quipus could also record narrative or linguistic content remains debated, with some researchers arguing for a narrative function that has not yet been decoded.

Inca religious and political ideology centered on the worship of Inti (the sun god) and the special status of the Sapa Inca as the son of the sun. The mummified bodies of dead emperors were treated as living presences, consulted on important decisions and brought out for religious ceremonies — a practice that had important implications for imperial succession, since dead emperors retained their estates and continued to be provided for by large numbers of attendants.