Laura Carlsen tells the story in detail here, comparing what was supposed to happen under the theory of comparative advantage with what actually did happen. Before NAFTA Mexico produced enough food to feed itself. Now it imports 42 percent of its food. Two million farmers were forced off the land and did not find jobs in manufacturing as expected. Instead of having national food security, Mexicans are subject to the vagaries of international commodity prices leading most notably to the 2007 tortilla crisis. Obesity has become epidemic as the poor population shifts to high fructose corn syrup and other processed foods. Twenty million Mexicans now live in "food poverty," and malnutrition is worst in farm families.