First, killing thousands of people, the loss of people in a loss that can't be calculated (war). Although the Aztecs certainly weren't the first people ever to sacrifice humans, the fact that they did and the incredible number they sacrificed led to the hatred of some of the surrounding peoples. The powerful city-state of Tlaxcala was one of these. Many of their own had been sacrificed, and in the end they joined the Spaniards to fight the Aztecs. It may be that the Spanish simply was an excuse to start what was already an inevitable civil
First, killing thousands of people, the loss of people in a loss that can't be calculated (war). Although the Aztecs certainly weren't the first people ever to sacrifice humans, the fact that they did and the incredible number they sacrificed led to the hatred of some of the surrounding peoples. The powerful city-state of Tlaxcala was one of these. Many of their own had been sacrificed, and in the end they joined the Spaniards to fight the Aztecs. It may be that the Spanish simply was an excuse to start what was already an inevitable civil