What differences are there in the brain besides physical ones? And the point is not that the changes happened because of social pressures, but because more comp

What differences are there in the brain besides physical ones? And the point is not that the changes happened because of social pressures, but because more complicated forms of social interaction aided our ability to work in groups to survive. For example, I don't think it's a major stretch to imagine that rudimentary mathematics might've arisen so that we could communicate to each other hunting distances, necessary food rations, etc... By the way, I think your point is valid, and I'm not sure why you're being downmodded. It seems that downmod here is becoming more like the reddit disagreement downmod than indicating whether the content of the post is valid, as it should be.