No, it’s a theory but the one I think that best explains the facts (if I understand your question.) At a high level, you need to account for our capacities for empathy and cooperation but also atrocity and genocide. Happy to provide some sources. David Sloan Wilson plus Sam Bowles and some of the other Sante Fe Institute folks are good starting points.

Here’s my workout. More trees:-) Might be worth a scan down the page.