“The short answer is that no one knows why agriculture developed as it did. Making food out of plants is hard work. The conversion of wheat, rice, corn, millet, barley, and other grasses into staple foodstuffs is one of the great achievements of human history, but also one of the more unexpected ones. You have only to consider the lawn outside your window to realize that grass in its natural state is not an obvious foodstuff for nonruminants such as ourselves. For us, making grass edible is a challenge that can be solved only with a lot of careful manipulation and protracted ingenuity. Take wheat. Wheat is useless as a food until made into something much more complex and ambitious like bread, and that takes a great deal of effort. Somebody must first separate out the grain and grind it into meal, then convert the meal into flour, then mix that with other components like yeast and salt to make dough. Then the dough must be kneaded to a particular consistency, and finally the resulting lump must be baked with precision and care. The scope for failure in the last step alone is so great that in every society in which bread has featured, baking has been turned over to professionals from the earliest stages. It is not as if farming brought a great improvement in living standards either. A typical hunter-gatherer enjoyed a more varied diet and consumed more protein and calories than settled people, and took in five times as much vitamin C as the average person today. Even in the bitterest depths of the ice ages, we now know, nomadic people ate surprisingly well—and surprisingly healthily. Settled people, by contrast, became reliant on a much smaller range of foods, which all but ensured dietary insufficiencies. The three great domesticated crops of prehistory were rice, wheat, and maize, but all had significant drawbacks as staples. As the journalist John Lanchester explains: “Rice inhibits the activity of Vitamin A; wheat has a chemical that impedes the action of zinc and can lead to stunted growth; maize is deficient in essential amino acids and contains phytates, which prevent the absorption of iron.†The average height of people actually fell by almost six inches in the early days of farming in the Near East. Even on Orkney, where prehistoric life was probably as good as it could get, an analysis of 340 ancient skeletons showed that hardly any people lived beyond their twenties. What killed the Orcadians was not dietary deficiency but disease. People living together are vastly more likely to spread illness from household to household, and the close exposure to animals through domestication meant that flu (from pigs or fowl), smallpox and measles (from cows and sheep), and anthrax (from horses and goats, among others) could become part of the human condition, too. As far as we can tell, virtually all of the infectious diseases have become endemic only since people took to living together. Settling down also brought a huge increase in “human commensalsâ€â€”mice, rats, and other creatures that live with and off us—and these all too often acted as disease vectors. So sedentism meant poorer diets, more illness, lots of toothache and gum disease, and earlier deaths. Bryson, Bill. At Home (p. 67). Knopf Doubleday Publishing Group. Kindle Edition. Bryson, Bill. At Home (p. 67). Knopf Doubleday Publishing Group. Kindle Edition. Bryson, Bill. At Home (pp. 66-67). Knopf Doubleday Publishing Group. Kindle Edition. Bryson, Bill. At Home (p. 66). Knopf Doubleday Publishing Group. Kindle Edition. Bryson, Bill. At Home (p. 66). Knopf Doubleday Publishing Group. Kindle Edition. ”
