Since there will be no distinction between climate change and linkage to humans.

...than we are.
Actually, a thought occurred to me on reading this: I wonder if anyone has thought that maybe the turn to agriculture was motivated by a lack of megafauna to hunt down? Gardening on a small scale has probably always been practiced, but large scale agriculture may have gotten a kick from extinctions of megafauna.

Our primary evolutionary advantage is our brain, which is essentially a limit-removal mechanism. The vicious circle of growing until a limit is hit, then using our brains to circumvent the limit, followed by more growth (either in numbers or activity) is a positive feedback loop that is inherently unsustainable. It's also genetically embedded and unconsciously implemented, which is why we can't short-circuit it through conscious thought. As you say, this behavior is visible throughout human history. It's just what we are.

The concept of sustainability is a lie.

so we have to try.

The human spirit can't be contained by dictators, just as nature can't be controlled by humanity. We'll try though. We really can't do anything else.

but our definition of "try". Humans have tried to survive simply by being a life form on this planet. How we have tried, how we have been able to recognize our place in the system, how our senses have analyzed our surroundings and dealt with it for survival is what matters. Higher functioning brains don't auto-translate to better in all systems, on the contrary. Evolving brain function can be our dead end if the increased function comprehends and selects individual or clan identity for survival over survival within the context of the whole system. I think we are a failed species in that our brain developed too quickly under extreme conditions, probably extinction events, disrupting the processes that may have made us a viable addition to the planet. Unfortunately, I think we missed the boat and will be relatively short lived.

So, I don't say we have to try... we must change. If we do make massive uncharacteristic changes in our patterns of survival we may extend our species by a few more centuries. Continue the way we are.... I doubt it.

It fills a gaping hole I call "massive uncharacteristic changes" we need to make. We won't.

The Pomo people lived along the Mendocino coast for 3000 years fishing and harvesting acorns.

That study is on global effects. One tribe doesn't invalidate it.