Why do we know more about the Aztec than about other south an Central American societies?

The Aztec civilization was particularly well-documented due to their highly organized society and their contact with Spanish conquistadors, who wrote extensively about their encounters. Additionally, the Aztec capital city, Tenochtitlan, was located where modern-day Mexico City stands, making it a prominent center for exploration and archeological study. Other Mesoamerican societies may not have left as abundant a historical record or been as geographically accessible for study.