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There is research on this. A good place to start is dunbar's number. http://en.m.wikipedia.org/wiki/Dunbar's_number http://en.m.wikipedia.org/wiki/Dunbar's_num
by jshen 13y ago
There is research on this. A good place to start is dunbar's number.
http://en.m.wikipedia.org/wiki/Dunbar's_number http://en.m.wikipedia.org/wiki/Dunbar's_number