Fat is not a feminist issue, as Susie Orbach once claimed. Fat is a class issue. Rich, educated people are not fat; you see almost no children in private schools who are overweight. Fatness and obesity are directly related to lower education and lower incomes. What is sad is that at a time when this country is richer than ever and ought to have better schools than ever, we have far more fat people than ever — a dangerous explosion of flab. Last week the Department of Health issued a report grimly called Forecasting Obesity to 2010 and its findings...