Why Inside the Bell?

A number of years ago my then teenage daughter exclaimed, “There are so many stupid people in the world.”  My somewhat glib answer at the time was to draw a normal distribution curve based on my belief that human IQ scores would fit such a pattern.  “If,” I told her, “people with low IQ’s were on the left and people with high IQ’s on the right, then most people would group around the center IQ score which is assumed to be 100.  If you are exactly average,” I drew a vertical line down the middle of the curve, “then half of the people in the world will seem stupid relative to you.”

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