Americans are WEIRD

"Western urban children grow up so closed off in man-made environments that their brains never form a deep or complex connection to the natural world. "

Humans are not homogenous.

And implications for social science.

A great read with great insights: http://www.psmag.com/magazines/pacific-standard-cover-story/joe-henrich-weird-ultimatum-game-shaking-up-psychology-economics-53135/