How many friends can you really have in your social network.
Coaching Tip
FEBRUARY 14, 2011
Robin Dunbar, an evolutionary psychologist and social-brain theorist, and others have documented correlations between brain size and social-group size in many primate species. Above 150, you have to impose complicated hierarchies and rules to command loyalty and cohesion. Source: The Wall Street Journal, February 12, 2011.
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