> I've read that there is a certain number of people that we're basically optimized to coexist within a societal structure

https://en.wikipedia.org/wiki/Dunbar%27s_number

> Proponents assert that numbers larger than this generally require more restrictive rules, laws, and enforced norms to maintain a stable, cohesive group. It has been proposed to lie between 100 and 250, with a commonly used value of 150.