> his point of view is also interesting when considering our predecessors, tribes who lived in the forests, not Mayan civilisation or whatever, but tribes, they

> his point of view is also interesting when considering our predecessors, tribes who lived in the forests, not Mayan civilisation or whatever, but tribes, they leave no trace because everything they take or make is of the forest and goes back into the ground just like every other part of the ecosystem - they were the only harmonious humans and there still are small numbers of tribes who live like this. No. It doesn't require civilization to do this. Virtually all of the North American megafauna were wiped out within a very short time after the first paleo-Indians arrived.