When missionary and colonial doctors worked with the native populations of Africa, Australia, the North Pole, the Americas, and the Pacific Islands, they discovered that cancer, dental cavities, asthma, appendicitis, hypertension, diabetes, ulcers, and heart disease were rare or nonexistent in these populations. These doctors also noticed that those among the natives who followed the Western diet developed these diseases. Of course, this does not mean that the natives of thes