Bigger numbers, not better brains, smarten human cultures

Tool innovations take off as populations grow and share diverse ideas

CULTURE CLUB  While part of a team, computer-game players saw examples of how to draw an arrowhead, left, and a fishing net, right, before trying to copy or improve on the originals. Larger groups in this game developed more effective designs, suggesting that big populations drive cultural evolution.

ISEM/CNRS

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