Pachacuti Founds the Inca Empire

Around 1438, the Inca kingdom of Cusco faced an existential crisis: the Chanka confederation launched a major offensive against Cusco. A younger prince who took the name Pachacuti — meaning 'He Who Transforms the World' — defeated the Chanka and then seized power from his own father. Over the next three decades, Pachacuti transformed Cusco from a regional capital into the heart of an empire stretching from the Atacama Desert to southern Colombia. Unlike the Triple Alliance's tribute-extraction model, Tawantinsuyu was built on direct administrative incorporation. Conquered peoples were relocated through the mit'a labor draft, their children sent to Cusco for education, and their local elites integrated into the imperial nobility through reciprocal obligation. The quipu — knotted cord records — allowed the empire to track census data and tribute obligations without a writing system. Pachacuti also redesigned Cusco itself, constructing the Coricancha (the Temple of the Sun), whose walls were sheathed in gold. He is traditionally credited with commissioning Machu Picchu as a royal estate. By the time of his death in 1471, the Inca Empire encompassed an estimated 10 million people.

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