Your definition of the word “thrive” is certainly controversial, if not outright naive.

Your observations are, in my opinion, correct and interesting.

But you seem oblivious to the harmful aspects of these naturally equalitarian societies.

I for one, would much prefer the bottom rungs of a hierarchy that offers drugs, vaccination and protected sex. As opposed to living among equals, in a society where a gastrointestinal parasite could suddenly and brutally claim my life or a dented tooth could cause me horrible pains for years.