S

In the book’s preface, Smil writes that most growth processes—“of organisms, artifacts, or complex systems”—can be plotted on a so-called S-shaped, or sigmoid, growth curve, meaning that the rate of change increases slowly at first, then increases rapidly, then levels off. An error that humans make with similarly predictable regularity is to assume that the nearly vertical middle segment of an S-shaped curve can continue at that angle indefinitely (the price of Dutch tulips in the seventeenth century, the price of bitcoin in the twenty-first). One of his conclusions is that the steady, unceasing economic expansion that economists and politicians dream of is not sustainable, and that the relentless pursuit of growth is environmentally disastrous. Smil has often said that he doesn’t make forecasts—“a pathetically and inexorably ever-failing endeavor on any level,” he told me—but predictions of a kind are implicit in much of his work. In “Growth” ’s coda, he writes, “Continuous material growth, based on ever greater extraction of the Earth’s inorganic and organic resources and on increased degradation of the biosphere’s finite stocks and services, is impossible”—a principle that, in various forms, animates almost all his work, beginning with his undergraduate thesis.

from The New Yorker’s profile of Vaclav Smil. I got much value from his book on natural gas, still working on How The World Really Works.