The Aztecs were a pre-Columbian civilization and developed in Mesoamerica. The capital of the Aztecs was the city of Tenochtitlán, known for its grandeur and located where today is Mexico City, the capital of Mexico. The Aztecs have been known to form a civilization with a sophisticated lifestyle. They were dominated by the Spanish in 1521.
The basis of the division was social class I believe it was devised between the wealthy, middle, and lower class the lower class included slaves and indebted servants