MORE IDEAS FROM THE ARTICLE
The Savannah Theory or the Evolutionary Legacy Hypothesis suggests that we respond or react to circumstances just as our ancestors did.
A variety of different domains point out to the fact that our brains function best in a group of 150 people around us, not more. This includes early civilization evidence and the number of holiday greetings that people send in a year.
Smart people find that being a lot with other people distracts them from their aspirations and goals.
They find people around them annoying after a while, as they have better, more productive things to do, which they prefer doing alone.
We have something like a fixed "friendship budget." Extroverts may have more friends, but their friendships are not as close as those of introverts. We spend about 3,5 hours a day on social interaction. Your closest 5 friends get 40%, the other 10 in the group of 15 get the next 20%. And the last 135 friends get about 37 seconds a day.
The lesson is that you can't add time; you can only distribute it differently. Know who is important to you and prioritise them.
Friendships need to be carefully acquired to avoid negative influences. Friendships need a continuous effort that can be difficult to manage. They will go through ups and downs and will be subject to time pressure and geographical constraints.
However, our ability to form friendships is critical and a fundamental part of who we are.