This post can be quite provocative.
Individualism.
There was an interesting discussion about individualism, and groups. It consisted about people having less friends when they grow up older.
One contribution to this was point that there is no need to seek her/himself what person will be, and maybe also found a partner to live with.
This could be an interesting when thinking e.g that animals live 1-2 years with their mother before leaving to live on their own.
So in theory, as deducting one thought from those, is that we seek safety from the groups, and when being self sustainable, we are meant to live on our own instead of staying on the groups. Which means that "weakest” ones stay on groups, gather into cities instead of live on without noise, knowledge where the next door neighbour is.
Which essentially could also mean that we are meant to be more introvert than extroverts, extroverts have just evolved from the people who sought safety of others, not capable being, and surviving, on their own. This and also the places for resources such as food, minerals, material etc.
Sent from my iPad