It was once a virtue to have some excess weight, kids weren’t considered picky eaters, and the term “overweight” didn’t even exist. What changed? Helen Zoe Veit, an associate professor of history at Michigan State University, and author of “Modern Food, Moral Food: Self-Control, Science, and the Rise of Modern American Eating in the Early Twentieth Century,” joined us to talk about how America began to moralize the food that we eat — or don’t eat.