Dunbar overlap: the average overlap in Dunbar slots of you and your Dunbar slots.
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Dunbar overlap of 1 means you're part of a 150 people social diamond where everyone has everyone else in their Dunbar slots.
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Dunbar overlap of 0 means nobody in your Dunbar slots has anyone else from your Dunbar slots in their Dunbar slots.
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Things I assume: before invention of agriculture virtually everyone had a Dunbar overlap > 0.8. 1/
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Now most people are < 0.5. people with < 0.1 not that rare. 2/
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People with higher Dunbar overlap on average happier but people with lower Dunbar overlap on average have higher income. 3/3
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I've heard the latter but not the former. Is that commonly known?
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It's what I assume but I don't even have anecdotal evidence for it.
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It just occurred to me that perhaps introverts prefer low-dunbar overlap.
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