The pre-Columbian era spans the history of the Americas from the first human settlement to the beginning of European colonization in 1492. Indigenous peoples arrived in stages, probably from Asia via Beringia and perhaps along the Pacific coast, with migration dates still debated.
Over thousands of years, societies adapted to radically different environments. Some remained mobile hunter-gatherers; others built permanent villages, monumental earthworks, irrigation systems, cities, and empires. North America saw mound-building cultures, Cahokia, Ancestral Puebloan settlements, and desert irrigation societies. Mesoamerica produced the Olmec, Teotihuacan, Maya, Toltec, Mexica, and many other civilizations, while South America saw Norte Chico, Moche, Tiwanaku, Wari, and the Inca.
Indigenous farmers domesticated maize, potatoes, cassava, beans, squash, chili peppers, cocoa, and many other crops. Their achievements included writing, calendars, astronomy, engineering, trade networks, metallurgy, and sophisticated political systems. European conquest brought warfare, colonization, and devastating diseases, transforming populations and societies permanently.