I agree with you the author makes assertions but has not citations to back them up. LIke this quote: "How fat you are has a lot more to do with your genes than with your behavior. As much as 80 percent of the variation in human body weight can be explained by differences in our DNA."

I don't buy it nor have I seen an science to back it up. Behavior has a lot to do with obesity. And I do not buy that kids that park in front of the TV or a game are no different than those that go outside and DO things. Some people have genetics that do increase their chances of being obese but it's not over whelming. Anyone who has gone from being 21 to being 35 knows dam well that much of the weight gain is from decreased activity but no decrease in food consumed.