>I live in a village of hundreds. We live gregariously and peacefully. But how about those people living in cities whose populations exceed the entire protohuman population?

I live in a city of almost nine million. Which far exceeds such a population, and not of proto-humans, but of fully modern ones (assuming the Toba Catastrophe Theory[0] is correct). As such, it's a pretty good bet that those few thousand who survived such a bottleneck 50-75k years ago lived similar lives (albeit with less technology) as we do today.

And while we do have some issues with anti-social behavior (which, I'm sure, is present in your village on a much smaller scale -- and only because it's a much smaller population) in my city of almost nine million, on the whole people are cooperative, supportive and pro-social.

If you don't like cities, that's fine -- don't live in one. But while Dunbar's Number[1] isn't applicable in my city, for the most part, we live pretty good lives.

[0] https://en.wikipedia.org/wiki/Toba_catastrophe_theory

[1] https://en.wikipedia.org/wiki/Dunbar's_number

> how about those people living in cities whose populations exceed the entire protohuman population?

How about it? I spend lots of time in cities; they are generally peaceful, gregarious and friendly.

> if you have a source stating authoritatively how society functioned seven million years ago, as we parted evolutionary ways with the baboons and chimpanzees, I would love to read it.

What is your point here?