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Regardless of whether you think the industrial era has been good or bad, three profoundly fundamental shifts underlie this revolution. The first is that industrialists harnessed new sources of energy, primarily to produce things. Preindustrial people occasionally used wind or water to generate power, but they mostly relied on muscles—human and animal—to generate force. Industrial pioneers such as James Watt (who invented the modern steam engine) figured out how to transform energy from fossil fuels such as coal, oil, and gas into steam, electricity, and other kinds of power to run machines. The first of these machines were designed to make textiles, but within decades others were invented to make iron, mill wood, plow fields, transport things, and do just about everything else one can manufacture and sell (including beer)7. A second major component of the Industrial Revolution was a reorganization of economies and social institutions. As industrialization gathered steam, capitalism, in which individuals compete to produce goods and services for profit, became the world’s dominant economic system, spurring the development of further industrialization and social change. As workers changed their locus of activity from the farm to factories and companies, more people had to work together even as they needed to perform more specialized activities. Factories required more coordination and regulation. In
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Daniel E. Lieberman (The Story of the Human Body: Evolution, Health and Disease)