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" Better health and better nutrition—above all, greater intakes of high-quality animal protein (milk, dairy products, meat, and eggs)—have driven the shift, and being taller is associated with a surprisingly large number of benefits. These do not include generally higher life expectancy, but a lower risk of cardiovascular diseases, and also higher cognitive ability, higher lifetime earnings, and higher social status. Correlation between height and earnings was first documented in 1915 and has since been confirmed repeatedly, for groups ranging from Indian coal miners to Swedish CEOs. Moreover, the latter study showed that the CEOs were taller in firms with larger assets! "
― Vaclav Smil , Numbers Don't Lie: 71 Things You Need to Know About the World
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" The principal reason for this limited mastery of materials was the energy constraint: for millennia our abilities to extract, process, and transport biomaterials and minerals were limited by the capacities of animate prime movers (human and animal muscles) aided by simple mechanical devices and by only slowly improving capabilities of the three ancient mechanical prime movers: sails, water wheels, and wind mills. Only the conversion of the chemical energy in fossil fuels to the inexpensive and universally deployable kinetic energy of mechanical prime movers (first by external combustion of coal to power steam engines, later by internal combustion of liquids and gases to energize gasoline and Diesel engines and, later still, gas turbines) brought a fundamental change and ushered in the second, rapidly ascending, phase of material consumption, an era further accelerated by generation of electricity and by the rise of commercial chemical syntheses producing an enormous variety of compounds ranging from fertilizers to plastics and drugs. "
― Vaclav Smil , Making the Modern World: Materials and Dematerialization
