Lizzie,

I think we've been over this before. When Anatomically Modern Humans moved out of Africa around 50,000 years ago they caused HAVOC. They exterminated the megafauna of five continents and they certainly didn't live in harmony with their environments! Some groups learned how to do this - but by no means all.

In addition many indigenous groups indulged in persistent and deadly warfare with their neighbours. North America was a hot bed of savage warfare for centuries: mass murder, rape, scalping and torture were rife. After the European influx many tribes saw European weapons as ideal tools to slaughter their neighbours with. Tribes frequently signed up as mercenaries so that they could batter their enemies more efficiently and right up to the reservation period they hated their 'traditional' enemies more that they did the white man.