The Big Idea: Dunbar's Number
Sunday 20 May
BBC WORLD SERVICE
A great advantage of the internet and social media is that they allow us to keep in touch with all our friends, even when they move away. That means our group of friends can carry on expanding indefinitely. Except, says anthropologist Robin Dunbar, it can’t. There’s a limit to the number of friends we can have. It is known as Dunbar’s number. Dunbar has investigated friendship, including the stark differences between how male and female friends interact. The Dunbar number has implications for the running of organisations – such as companies and armies.
- Produced by Ben Cooper for BBC World Service.
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