2014 | OriginalPaper | Chapter
Looking Good
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According to evolutionary psychologist and social network guru Robin Dunbar, the average size of social groups in monkeys and other primates is directly proportional to the size of the neocortex — the thoughtful bit — relative to the rest of the brain. The reason, Dunbar argues, is that the maintenance of larger numbers of stable interpersonal relationships — of which mutual grooming is the most obvious manifestation — requires correspondingly more neocortical processing capacity.