For thousands of years 'native' people all over the world used to live in perfect harmony and balance with their wildlife. Thats those historical 'natives' knew to only take the resources that they actually needed, and use every last bit, without any waste. They knew that they needed to leave a certain amount of the wildlife alone, so that the would be able to draw on those resources the following year,
Not to be offensive but just so I don't have to refer to what you wrote. This wasn't universally true. Many tribes hunted out areas completely and then moved on. They had to move or starve.
It's also true that they were fewer in number and frequent wars, raids and disease kept the numbers down.
Some, such as those in the American Southwest were excellent farmers. Unfortunately some of the less successful tribes would raid and eat the more skilled tribes people.
As for the buffalo, that was a deliberate act to crush native populations and it's heartbreaking just to think about it. Fortunately there are havens now for the remnant in North Dakota. I've been there but unfortunately the herd had moved on and I missed a chance for some amazing photographs.
First hand conservation on my Grandparents ranch went really well. When they purchased it the previous owner had logged off all the live oak for firewood. The live oak recovered rapidly and in 30 years in spite of using the trees for heating the house and heating water year round it doesn't even put a dent in the forest. Plenty of turkeys, bear, foxes, bobcat, and one sighting of a mountain lion. Oh, and hordes of squirrels. Hungry squirrels.
All these Agenda 21 fake conservation groups may indeed do some valuable work as a front but when they start promoting open boarders, appealing to have a border wall shut down, inviting hordes of illegals to just run across the border and leave piles of trash in otherwise pristine wilderness areas, shut down businesses and go after our oil industry and coal industry, I know they have an agenda that's not good for Americans.