Facts about Dunbar's Number

1. 05

   Anthropological evidence supporting Dunbar's Number comes partly from studies of historical human communities, including Neolithic villages and military units, which cluster around 150 members.

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2. 04

   Dunbar's Number emerged from research published in 1992, linking cognitive capacity for social bonding to brain size across primates.

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3. 03

   Robin Dunbar identified several smaller grouping layers within Dunbar's Number, including an inner circle of roughly 5 close friends and a sympathy group of around 15.

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4. 02

   The theory behind Dunbar's Number is grounded in the observed correlation between neocortex size and social group size across primate species.

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5. 01

   British anthropologist Robin Dunbar proposed that humans can maintain stable social relationships with roughly 150 people at one time.

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