Obesity is now thought to be an illness. In paleolithic times, it was the key to survival. I think that the thing that gave us an edge over the neandertals was not our big brains (theirs were slightly bigger) but our big bellies. Our unique ability to get fat and lazy allowed us to survive during times of extreme hardship. It now works against us in times of sustained prosperity. We weren’t made for these times.
—Yahoo! 360° - Douglas Crockford’s Department of Style - Venus of Willendorf