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RE: The Theory of Learning by Jean Piaget
You should look into Aztec civilisation :)))
I'll make it easier for you:
It is possible that around 20,000 people were sacrificed a year in the Aztec Empire. Special occasions demanded more blood – when a new temple to Huitzilopochtli was dedicated in 1487, an estimated 80,400 people were sacrificed.
PS. I just mentioned 1 civilisation... You should check the rest...