63. The “Strong Tie” Group Size Limit is 150 People

You have your Facebook friends and your LinkedIn connections. Maybe you have people you follow and who follow you on Twitter. Then there are the colleagues you work with, people you know from your community organizations like schools and churches, and your personal friends, and your family members. How many people are in your network overall?

Dunbar’s Number

Evolutionary anthropologists study social groups in animals. One question they have been trying to answer is whether there is a limit on how many individuals different species have in their social group. Robin Dunbar (1998) studied different species of animals. He wanted to know if there was a relationship between brain size (specifically ...

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