Are you referring to the situation 1-2 millions years ago when human brain size expanded? The sitatuion back then and now are not comparable. Just like inuits d

Are you referring to the situation 1-2 millions years ago when human brain size expanded? The sitatuion back then and now are not comparable. Just like inuits don't eat much plant-based food, like I said they had no choice, they needed fire to warm themselves, they needed food, any food in their different climate at that time. We can't transpose this situation now, we can grow more various vegetables, we can get all the nutrients from them, and actually more than meat