These inventors of chocolate were a bloodthirsty lot who enjoyed mass human sacrifice. What empire ruled over central Mexico?

Let there be blood. Historians estimate that around 20,000 human victims were sacrificed annually in absolutely heinous ways which we won't go into here. On important occasions (like when temples were dedicated), four times that number were given to the gods. On a lighter note, the Aztecs also invented chocolate. So, there's that...

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