Earlier quoted context omitted.
it's impossible to prove the counterfactual (I guess, as I imagine we don't have enough gene information that far back). But I'd imagine that the high calorie food you can get starting with the advent of agriculture is exactly what could drive evolution in a certain direction that helps brains grow. We've had ~1000 generations since then, that should be enough for some change to happen. Our brains use up 20% of the b…
The advent of agriculture did not provide better food, it was just the only solution to avoid extinction due to the lack of food. The archaeological evidence shows that for many generations the first neolithic farmers had serious health problems in comparison with their ancestors. Therefore it is quite certain that they did not transition to agriculture willingly, but to avoid starvation. Later, when the agricultural…
I see your point about agriculture at first degrading quality of food. Are you aware of evidence of brain size degrading even? Is it visible in the temple bones?