The first factor of health is food. Nature-peoples are, as a rule, poorly fed. Their meals are irregular, generally poor in quality, and of ten insufficient in quantity. The roots, berries, and other foods which nature furnishes, are usually poor in nutritive qualities. Hence the savage is habitually underfed, since the system is starved even though large quantities of coarse food be taken. This simply means that the digestive organs are burdened with material which does not nourish, and causes a distension of the abdomen, as may be witnessed almost...