Which regions of the Americas were home to the major pre-Columbian urban civilizations?

Major pre-Columbian urban civilizations developed in two primary regions of the Americas: Mesoamerica and the Andean region of South America.12

Mesoamerica

Mesoamerica encompasses parts of modern-day Mexico and Central America, including all of Guatemala and Belize, and portions of Honduras and El Salvador. This region is characterized by diverse highland and lowland environments that supported complex agricultural societies. Notable civilizations that emerged here include:13
* Olmec: Often considered the first major Mesoamerican civilization, known for monumental stone sculptures and early urban centers.12
* Maya: Renowned for their advancements in mathematics, astronomy, hieroglyphic writing, and calendar systems.12
* Teotihuacán: A powerful urban center in the Valley of Mexico that exerted significant political and commercial influence.12
* Toltec and Aztec: Successive empires that dominated central Mexico, with the Aztec Empire serving as the final major Indigenous power before the Spanish conquest in 1521.142

Andean Region

The Andean civilization developed along the western coast of South America, primarily within the Andes Mountains and the adjacent Pacific coastal deserts. Key civilizations and cultural horizons include:15
* Chavín: An early horizon culture known for its widespread influence in sculptural art.1
* Moche, Nazca, and Tiwanaku: Regional cultures that flourished during the Early Intermediate and Middle Horizon periods.1
* Inca: The largest empire in the region, which, by the time of the Spanish conquest in 1532, extended from modern-day Ecuador and Colombia in the north to central Chile in the south.167

While these two regions shared some knowledge of agriculture and technology, they largely followed separate courses of development, responding to their unique environmental and social stimuli.1