There is no single tribe that has carefully tended the land for thousands of years. Additionally, since they lacked a meaningful method of keeping knowledge beyond word of mouth, any non-common technique would have to be rediscovered every 100 years. They weren't carefully tending to the land, they were just struggling to get by with their crap agricultural skills.
Nearly everything you said is just plain wrong.
> no single tribe that has carefully tended the land for thousands of years
Yes you are right, there were MULTIPLE soveriegn tribes that did that. And yes they did tend the land for thousands of years. Look up Tending the wild by Kat Anderson.
> since they lacked a meaningful method of keeping knowledge beyond word of mouth, any non-common technique would have to be rediscovered every 100 years
Huh? So I guess there was not a chance that one of those millions of native Americans still living on reservation lands in the 1900s passed down any knowledge of how they lived. Interesting assumption there chap.
>crap agricultural skills
"Crap agricultural skills"? Good lord. Americans are the ones with "crap agricultural skills." It's not normal for soil to be unusable for half a decade after farming FYI. Ever heard of soil erosion? Look up Three Sisters, https://milkweed.org/book/braiding-sweetgrass, Karletta Chief's field work, Indigenous Environmental Perspectives:NAP.
No, there were none that have done that. There is no civilization that has lasted thousands of years, let alone some tribe.
>Interesting assumption there chap.
Not an assumption at all. Without writing, there was absolutely no useful way to preserve knowledge for any long period of time. Best you have are traditions and stories, which are lossy at best and easily wiped out by conflict.
>"Crap agricultural skills"? Good lord. Americans are the ones with "crap agricultural skills."
If it weren't for the agricultural technology and skills enabled by the scientific institutions of the "colonizers", we would still be having our children starving to death during droughts like the tribes and the early settlers. If it weren't for that technology, there wouldn't be enough farm land to feed all of the humans on the planet.
If it weren't for the "colonizers", tribes would still be murdering each other over territory during droughts, dying from simple diseases, suffering from malnutrition, living in terrible shelter, etc.
If tribes really were go great back then, none of the Native American reservations would be using any modern technology and people would be clamoring to join them and learn their ways.
Of course there were territorial disputes, just like there are today with other nations. But most of the difficulty between tribes arose as a result of white influence, starting with the Spanish and continuing onward.
This is just an assumption because there was no written history of tribes before the "white influence".