Describe and Discuss the Aztec Civilization. What Factors May Have Lead to Its Collapse?

The Aztec civilization was the name given to the group of different states that dominated central and southern Mexico. These states were allied but ethnically different between the 12th and 16th centuries, around the time of the Spanish invasion.
The Heinemann Australian Dictionary (1992) defines the word Aztec as:
"a) any of a people inhabiting Mexico between A.D. 1100 and A.D. 1519 (the Spanish Invasion). b) their language, a variety of which is still spoken in Mexico."
The language of the Aztecs was Nahuatlan branch of the Uto-Aztecan family. …