it's the documentary talked about here, I highly recommend it: https://www.theguardian.com/world/2014/aug/01/amazon-tribe-m...
Modern hunter-gatherers do not necessarily equal ancient ones.
edit: and as bad_user pointed out, thats a huuuge reason itself to even be nomadic
Just because modern, industrialized humans are out of touch with natural limits doesn’t mean we were always like this.
I'm not trying to argue that ancestors were smarter.
For our own political purposes, it's probably best if the narrative becomes "all of our ancestor societies binged themselves to collapse, so we need to be very careful about our own habits" although it's not exactly true that all groups did that.
Ancient civilizations rarely had a clue of how a desert came to be. Certainly, we today understand the environmental impact we have.
Furthermore, we posses many tools to combat the problem: resource taxation; development of sustainable technology; reduction of waste and consumption.
https://en.wikipedia.org/wiki/List_of_North_American_animals...
https://en.wikipedia.org/wiki/List_of_South_American_animals...
But in fact few things in nature lives in harmony. If there is a balance it's usually kept through violent death or starvation.