I agree with the author's central premise: that the rise of the original "Food Pyramid," with its recommendation to base our diets on "whole grains," also known as carbohydrates, is a primary cause of overweight in the U.S. Taubes provides study after study, some going back a century or more, in support of his hypothesis. It's hard to conclude anything else, when all of the evidence is considered. The question then becomes what to do about it.