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“Food processors, dishwashers, vacuum cleaners, and clothes-washing machines have substancially lessened the physical activity required to cook and clean. Air conditioners and central heating have decreased how much energy our bodies spend to maintain a stable body temperature. Countless other devices, such as electric can openers, remote controls, electric razors and suitcases on wheels, have reduced, calorie by calorie, the amount of energy we expend to exist.”
― Daniel E. Lieberman, The Story of the Human Body: Evolution, Health, and Disease

“Nothing over the last few million years of human history has changed human energetics as much as the low cost of working at a desk using machines run by electric power.”
― Daniel E. Lieberman, The Story of the Human Body: Evolution, Health, and Disease

“One of the ironies of industrialization is that its spread across the globe has required more people to spend more time sitting.”
― Daniel E. Lieberman, The Story of the Human Body: Evolution, Health, and Disease

“In short, the Industrial Revolution was actually a combination of technological, economical, scientific and social transformations that rapidly and radically altered the course of history and reconfigured the face of the planet in less than ten generations -a true blink of an eye by the standards of evolutionary time.”
― Daniel E. Lieberman, The Story of the Human Body: Evolution, Health, and Disease

“The bottom line, is that fat is vital for all species, but specially for humans.”
― Daniel E. Lieberman, The Story of the Human Body: Evolution, Health, and Disease

“During most all of human evolution, it was adaptive to conserve energy by being lazy as circumstances permitted. Energy was a vitally needed resourse and could not be wasted. Today this take-it-easy adaptation may lead us to watch tennis on television when we would be better off playing it. This can only aggravate the effects of excess nutrition. The average office worker would be much more healthy if he or she spent the day digging clams or harvesting fruit in scattered tall trees.”
― Randolph M. Nesse, Why We Get Sick: The New Science of Darwinian Medicine

“Except for professional athletes, dancers, cowboys, and a few other groups, most people in modern industrial societies have abnormally low energy expenditures. Workers sitting in swivel chairs or in driver's seats of cars or even pushing vacuum cleaners or electrically powered lawn mowers are being sedentary, and their leisure hours may be even more so.”
― Randolph M. Nesse, Why We Get Sick: The New Science of Darwinian Medicine

“Our bodies, for instance have a need to move and were designed to do so. You don't take a tank, for example, that is designed for war, and use it to run errands downtown or to approach the takeout window at McDonald's. A sedentary lifestyle is anathema to what humans evolved to be.”
― Steven Lesk M.D., Footprints of Schizophrenia: The Evolutionary Roots of Mental Illness

“We need to sweat more. Humans moved around in warm climates generally, which led us to lose our fur, and although there was some migration northward, activity in warm air makes one sweat. (Incidentally, the farther one goes from the equator, the greater the suicide rate. We evolved near the equator. There may be a connection there.) Sweating may have been a much greater excretion paradigm than we're now used to. Go toa sauna or a steam room. There are studies that show that using them reduces sudden death and cardiac mortality. Sorne toxins are stored in the fatty tissue of the skin only to be eliminated as we sweat. Along with sweating we need to replace fluids with good old water. Drink from the stream. Dietarily, ancient humans no doubt ate occasional meats but usually foraged around for edible plants and fruits. Not on a time schedule like a modern office dude, cave guy ate anytime he found something edible.”
― Steven Lesk M.D., Footprints of Schizophrenia: The Evolutionary Roots of Mental Illness

“Sitting eight hours a day may take more of a toll than we realize. We were not designed for that. On the other hand, evolution helps us adapt to these modern demands. Those whose bodies are more tolerant of sitting have no doubt already been favored by natural selection.”
― Steven Lesk M.D., Footprints of Schizophrenia: The Evolutionary Roots of Mental Illness

“Humans went from experiential and physical beings to conceptual ones, and one could surmise that in the future we will become even more brainy still. The changes in sedentary lifestyle alone are staggering. Dietary changes might have led to a diabetes since there may be different levels of pancreatic reserve. The explosion of carbohydrate intake that moderns indulge in may surpass the limit of the pancreas to endure, resulting in either childhood diabetes or later onset type 2 diabetes. We must be careful not to outsmart ourselves and in vanquishing the predators that plagues us for millions of years to create new ones. Having moved from chaos to order, we need to appreciate order’s value, to protect and enhance it. Any slide into chaos may well be swift and irreversible.”
― Steven Lesk M.D., Footprints of Schizophrenia: The Evolutionary Roots of Mental Illness