I have this beginning of a hypothesis that what we currently call "neurotypical" is a genetic adaptation (a quick calculation gave me roughly 7000 years, so about 250 generations) to city life.
My current idea is that city life requires people to filter out much of their surroundings, and even many of the social cues of their fellow city dwellers, because otherwise they would be in constant overload. This could explain their muted cognitive and emotional profile and their more adaptive social profile.
Anyway, just a thought for now.
PS: Wouldn't it be typical for Global North city dwellers to center themselves as the norm?