I'm only a casual follower of ancient human evolution and anthropology, but this doesn't mesh with my impression. Lots of human groups have been able to relax in relatively hospitable environments, over long spans of time.

> Those human tribes who just chilled out after meeting the bare requirements of survival died off because some greedy assholes outcompeted them.

The idea of tribes just “chilling out” to survive is a modern anachronism projected on a romanticized past. We’re so disconnected from the realities of clothing, feeding and sheltering ourselves without modern amenities that it’s hard to imagine what pre-industrial like was like. Thinking that “chilling out” was a viable path to survival is a symptom of that disconnectedness.