How do we know that the people of mesoameria had early advanced civilizations?

We know that the people of Mesoamerica had early advanced civilizations through archaeological findings, such as monumental architecture, complex urban planning, and advanced agricultural practices. Civilizations like the Olmec, Maya, and Aztec developed sophisticated writing systems, mathematical concepts, and astronomical knowledge, evidenced by their codices and artifacts. Additionally, the existence of trade networks and social hierarchies indicates a level of organization and cultural development characteristic of advanced societies.