One of the laws of social networks is the Dunbar number, which states that you can not handle more than 150 real friends. Of course you can have more friends, but they will not be real or active ones. But that was before Facebook, as some people now think that social networks have increased this number to something closed to 500 friends.

When British anthropologist Robin Dunbar established his number, people could only meet physically or through the use of telephone. Dunbar thought that the size of our neocortex limited our capability to keep more than 150 friends. Friction of social obligation also helped. But there was no SMS nor social networks, and people were not used to multitasking. So 500 could be the new Zuckerberg number 😉