Oh, I agree we can never go back to a pre-tool like lifestyle.
I know a number of socialists who really do believe our way of life would go back to hunter-gatherer like post a serious SHTF event.
What I think will more interesting is to what level will some try to regain our current lifestyle (internet, JIT/BAU food supply system, etc.). I know of more than a few preppers for whom maintaining their current lifestyle and comfort post SHTF is paramount.
Those who understand the situation, accept it, and move on to the new emerging life will fair far better.