The document summarizes several major pre-Columbian civilizations in Latin America, including the Aztec, Maya, and Inca Empires. The Aztec Empire ruled over surrounding city-states from 1200-1521 CE and had a complex agricultural system and hierarchical society based on tribute, fear, and human sacrifice until being conquered by Hernan Cortes. The Maya occupied southern Mexico and Central America from 400 BC to 900 CE, known for ritual bloodletting and sacrifice before mysteriously collapsing. The Inca Empire expanded across western South America from 1000-1532 CE through a large army, advanced infrastructure, and a common language until being conquered by Francisco Pizarro.