Long before European contact, the Americas supported several sophisticated civilizations. The Olmec civilization, which flourished in present-day Mexico from about 1500 to 400 BCE, is often called the "mother culture" of Mesoamerica. The Olmec are remembered for their colossal stone head sculptures, early forms of writing, and ritual ballgames that influenced later Maya and Aztec cultures. The Maya civilization, developing from about 2000 BCE and lasting until roughly 1500 CE in present-day Mexico, Guatemala, Belize, and Honduras, built impressive pyramids, developed the most sophisticated writing system of pre-Columbian America using logograms and syllabic glyphs, advanced mathematics including the concept of zero, and remarkably accurate astronomical calendars such as the 365-day Haab', the 260-day Tzolk'in, and the Long Count.
Maya civilization was organized into independent city-states such as Tikal, Palenque, Copán, and Chichén Itzá, each ruled by a divine king. The southern lowland cities experienced the Classic Maya Collapse around 800–1000 CE, a still-debated abandonment likely caused by prolonged drought, warfare, overpopulation, environmental degradation, and political instability, though northern cities such as Chichén Itzá continued to thrive. In central Mexico, the Aztecs built a powerful empire from 1300 to 1521 CE, ruling from their island capital Tenochtitlan on Lake Texcoco, one of the largest cities in the world at the time, with perhaps 200,000 to 300,000 inhabitants, served by causeways, aqueducts, vast markets, and the Great Pyramid, or Templo Mayor. The Aztecs maintained control through a tribute system that extracted goods and sometimes captives for human sacrifice from conquered peoples, generating great wealth but also deep resentment.
Aztec religion centered on deities such as Huitzilopochtli, the sun and war god, and Quetzalcoatl, the feathered serpent. The Aztec Empire fell in 1521 when the Spanish conquistador Hernán Cortés, allied with discontented indigenous groups and aided by European diseases such as smallpox that had already devastated the population, besieged and captured Tenochtitlan. Far to the south, the Inca Empire, known as Tawantinsuyu, dominated the western coast of South America from about 1438 to 1533, ruling over ten million people across diverse terrain from its capital, Cusco. The Inca built the citadel of Machu Picchu, an engineering and sacred marvel of the Andes, and an extraordinary road system of over 25,000 miles crossed by rope bridges and patrolled by relay messengers called chasquis. Since the Inca had no written language, they recorded administrative and numerical information using quipus, knotted-string devices. The Inca Empire fell in 1533 when Francisco Pizarro captured and executed Emperor Atahualpa at the Battle of Cajamarca, taking advantage of internal civil war and the devastating effects of European disease.