Sex at Dawn полностью

When children and adolescents don’t get adequate nutrition for as little as a week, growth slows in the long bones in their arms and legs. When their nutritional intake recovers and the bones begin to grow again, the density of the new bone growth differs from before the interruption. X-rays reveal these telltale lines in ancient bones, known as Harris lines.¹⁰

Periods of more prolonged malnutrition leave signs on the teeth known as hypoplasias—discolored bands and small pits in the enamel surface, which can still be seen many centuries later in fossilized remains. Archaeologists find fewer Harris lines and dental hypoplasias in the remains of prehistoric hunter-gatherer populations than they do in the skeletons of settled populations who lived in villages dependent on cultivation for their food supply. Being highly mobile, hunter-gatherers were unlikely to suffer from prolonged starvation since in most cases, they could simply move to areas where conditions were better.

Approximately eight hundred skeletons from the Dickson Mounds in the lower Illinois Valley have been analyzed. They reveal a clear picture of the health changes that accompanied the shift from foraging to corn farming around 1200 AD. Archaeologist George Armelagos and his colleagues reported that the farmers’ remains show a 50 percent increase in chronic malnutrition, and three times the incidence of infectious diseases (indicated by bone lesions) compared with the foragers who preceded them. Furthermore, they found evidence of increased infant mortality, delayed skeletal growth in adults, and a fourfold increase in porotic hyperostosis, indicating iron-deficiency anemia in more than half the population.¹¹

Many have noted the strangely cavalier approach to food among foragers, who have nothing in the freezer. French Jesuit missionary Paul Le Jeune, who spent some six months among the Montagnais in present-day Quebec, was exasperated by the natives’ generosity. “If my host took two, three, or four Beavers,” wrote Le Jeune, “whether it was day or night, they had a feast for all neighboring Savages. And if those people had captured something, they had one also at the same time; so that, on emerging from one feast, you went to another, and sometimes even to a third and a fourth.” When Le Jeune tried to explain the advantages of saving some of their food, “They laughed at me. ‘Tomorrow’ (they said) ‘we shall make another feast with what we shall capture.’ “¹² Israeli anthropologist Nurit Bird-David explains, “Just as Westerners’ behaviour is understandable in relation to their assumption of shortage, so hunter-gatherers’ behaviour is understandable in relation to their assumption of affluence. Moreover, just as we analyze, even predict, Westerners’ behavior by presuming that they behave as if they did not have enough, so we can analyze, even predict, hunter-gatherers’ behaviour by presuming that they behave as if they had it made [emphasis added].”¹³

While farmers toil to grow rice, potatoes, wheat, or corn, a forager’s diet is characterized by a variety of nutritious plants and critters. But how much work is foraging? Is it an efficient way to get a meal?

Archaeologist David Madsen investigated the energy

efficiency of foraging for Mormon crickets (Anabrus

simplex), which had been on the menu of the local native

people in present-day Utah. His group collected crickets at a

rate of about eighteen crunchy pounds per hour. At that rate,

Madsen calculated that in just an hour’s work, a forager could

collect the caloric equivalent of eighty-seven chili dogs,

forty-nine slices of pizza, or forty-three Big Macs—without

all the heart-clogging fats and additives.¹⁴ Before you scoff at

the culinary appeal of Mormon crickets, give some thought to

the frightening reality lurking within a typical chili dog.

Another study found that the !Kung San (in the Kalahari

desert, mind you) had an average daily intake (in a good

month) of 2,140 calories and ninety-three grams of protein.

Marvin Harris puts it simply: “Stone age populations lived

healthier lives than did most of the people who came

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immediately after them.”

And maybe healthier than people who came long after them, too. The castles and museums of Europe are full of suits of armor too small to fit any but the most diminutive of modern men. While our medieval ancestors were shrimpy by modern standards, archaeologist Timothy Taylor believes that the human ancestors who first controlled fire—about 1.4 million years ago—were taller than the average person today. Skeletons dug up in Greece and Turkey show that pre-agricultural men in those areas were about five foot nine on average, with women being about five foot five. But with the adoption of agriculture, average height plummeted. Modern Greeks and Turks still aren’t as tall, on average, as their ancient ancestors.