What about the Natives?

Which natives are you talking about? The idea of the peaceful aboriginal (at least in Latin America) is outdated, simplistic, and generally wrong. There was everything from Maya wars for royal succession and regional political dominance to Inca and Huari wars of conquest to border and interchiefdom skirmishes between the Moche and Recuay. It's hard to call a time perio particularly peaceful when they drilled holes through defeated enemies' heads and wore them on lanyards.

you might want to look at what this sub has said about Pinker's better angels of our nature (a book making this claim). i can't load the video but from the description in the title i'm assuming they are making the same argument.