What made Aztecs a complex society?

The Aztecs were a complex society due to their advanced social structure, which included a hierarchy of nobility, priests, and commoners, as well as a centralized government that facilitated large-scale projects and military campaigns. They developed intricate agricultural practices, including chinampas, to support their growing population. Additionally, their rich cultural life, characterized by sophisticated art, extensive trade networks, and a polytheistic religion with elaborate rituals, further underscored their complexity. This combination of social, economic, and cultural factors made the Aztec civilization one of the most notable in Mesoamerican history.