Health and the Rise of Civilization
Mark Nathan Cohen
(excerpt from book of same title: pp. 131-141)
“There is also evidence, primarily from ethnographic sources, that primitive populations suffer relatively low rates of many degenerative diseases compared, at least, to the more affluent of modern societies, even after corrections are made for the different distribution of adult ages. Primitive populations (hunter-gatherers, subsistence farmers, and all groups who do not subsist on modern refined foods) appear to enjoy several nutritional advantages over more affluent modern societies that protect them from many of the diseases that now afflict us. High bulk diets, diets with relatively few calories in proportion to other nutrients, diets low in total fat (and particularly low in saturated fat), and diets high in potassium and low in sodium, which are common to such groups, appear to help protect them against a series of degenerative conditions that plague the more affluent of modern populations, often in proportion to their affluence. Diabetes mellitus appears to be extremely rare in primitive groups (both hunter-gatherers and farmers) as are circulatory problems, including high blood pressure, heart disease, and strokes. Similarly, disorders associated with poor bowel function, such as appendicitis, diverticulosis, hiatal hernia, varicose veins, hemorrhoids, and bowel cancers, appear rare. Rates of many other types of cancer particularly breast and lung appear to be low in most small-scale societies, even when corrected for the small proportion of elderly often observed; even those cancers that we now consider to be diseases of under-development, such as Burkitt’s lymphoma and cancer of the liver, may be the historical product of changes in human behavior involving food storage or the human-assisted spread of vector-borne infections. The record of the skeletons suggests, through the scarcity of metastases in bone, that cancers were comparatively rare in prehistory.
The history of human life expectancy is much harder to describe or summarize with any precision because the evidence is so fragmentary and so many controversies are involved in its interpretation. But once we look beyond the very high life expectancies of mid-twentieth century affluent nations, the existing data also appear to suggest a pattern that is both more complex and less progressive than we are accustomed to believe.” Click here to return to original post.