... the fact that the obese are often geographically concentrated in areas (like the American South) where public education is shit and poverty is high.
"American obesity rates are the highest in the world with 64% of adults being overweight or obese"
http://en.wikipedia.org/wiki/Obesity_in_the_United_States
"The trouble with doing something right the first time is that nobody appreciates how difficult it was." -- Walt West