But even as scientists identified more genes that seemed to have some sort of a connection to addiction, a problem presented itself. The move toward overeating, as a society, happened suddenly, starting in the early 1980s. For our genes to have been responsible for that, there would have had to have been an alteration in those people who succumbed to obesity, and genes simply couldn’t change that fast. The transformation of our DNA is the stuff of evolution, which takes place over many generations.
