When I think about how brilliantly the internet and mobiles enable us to maintain numerous close personal relationships in many places, I’m reminded of Dunbar’s number.
First proposed in the 1990s by British anthropologist Robin Dunbar, his suggestion is that the maximum number of people that humans can comfortably maintain stable relationships with is 150 (also discussed by Malcolm Gladwell in his book, The Tipping Point).
Dunbar explained it as:
The number of people you would not feel embarrassed about joining uninvited for a drink if you happened to bump into them in a bar.
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