How were Aztecs more advanced than North American Indians?

The Aztecs were more advanced than many North American Indian societies in several ways, particularly in their centralized political structure, extensive trade networks, and sophisticated agricultural practices, including the use of chinampas (floating gardens). They built large cities with impressive architecture, such as temples and pyramids, and developed a complex social hierarchy. Additionally, the Aztecs had a rich cultural life, including a written language, advanced calendar systems, and significant achievements in art and science. In contrast, many North American Indian tribes were more decentralized and varied in their social and economic structures.