The quotation of the week last week had to be that of Harvard professor Daniel E. Lieberman in an opinion piece for the New York Times. Lieberman, a professor of human evolutionary biology, was among those who publicly defended New York City Mayor Michael Bloomberg's plan to ban the sale of sugared soft drinks in cups larger than 16 ounces. And he did so using, of all things, evolution. Now, we all know that humans have always needed — or evolved to need — carbohydrates for energy. So how could evolution argue for Mayor Bloomberg's ban on sugar, a pure...