Why did the Aztecs perform human sacrifices What did they believe would happen if they did not?

The Aztecs performed human sacrifices for their gods. They believed that they owed everything towards them since the gods had created their very existence, and they thanked the gods by sacrificing. They believed that by sacrificing the gods would be pleased and would offer them good harvest, health, and weather. They thought that if they didn't sacrifice the gods wouldn't be happy and would send disasters towards them, like everything opposite of what they would do if they were happy. For example, natural disasters, illness, and bad crops. I hoped this helped.