If you want to see what happens to a people who are not “interrupted or assaulted by colonialism’, look at the lost tribes of the Amazon or the Australian aborigines. these people were left alone for millennia, and in the case of the lost tribes, still living a paleolithic existence, hunting and gathering, with no agriculture . a real Wakanda would probably also be yet another one of these, just with shiny pieces of metal that they have no idea what to do with.
At one point there was a civilization in the Amazon whose earthworks were spread across at least 155 miles. It wasn’t always jungle.
I was reading about a tribe of Amazonians and it was noted that they could only count to 2.
Anything more than that was simply called “many”.