Humans evolved to live in hunter-gatherer bands that were functionally anarchies, guided by a consensus established under the influence of respected leaders. I

Humans evolved to live in hunter-gatherer bands that were functionally anarchies, guided by a consensus established under the influence of respected leaders. If a consensus couldn't be reached the band split. Given all the changes we've made to our living situation going from 6,000/mile^2 to 60,000/mile^2 isn't really a big issue. If you want to live in the countryside nobody is stopping you but many of us actually enjoy living in cities.