It’s a situation many Americans recognize, particularly in recent times: you head to a store seeking a particular item and discover it costs more than you’re used to. Perhaps you’re tackling back-to-school shopping for your kids and see that a box of pencils has gone up by a dollar or two. You might buy fewer boxes than planned, or opt for pens instead. You likely don’t spend much time wondering what could have caused the pencil price to climb. Price shifts that lack a clear explanation occur all the time, and for most of us they provoke only mild irritation rather than amazement.
Yet a rise in pencil prices triggers a sequence of coordinated reactions to market signals that cross industries, traverse continents, and involve hundreds of thousands of people—a group of which you, without realizing it, are a part. No individual or company involved truly understands the full process they are part of, because it is bigger than any single person could grasp. That vast organizing principle of the free market was most famously described by the Scottish economist and philosopher Adam Smith, who referred to it as an “invisible hand.”
His tome The Wealth of Nations, published in 1776, a year famed for upheavals and revolutions, explored for the first time ideas of specialization and self-interest that would become foundational in economics. Smith used the term “invisible hand” only once in the book’s roughly 900 pages, but economists insist that the underlying concept is essential to his whole argument.
“If you read [Smith’s] work … it’s all about what we would now call the invisible hand,” Eamonn Butler, director of the Adam Smith Institute, a policy think tank, told The Dispatch. “In other words, how does our individual action affect society?”
Smith employed the metaphor in a passage about why a wealthy person might choose to invest in his own community. “By preferring the support of domestic to that of foreign industry, he intends only his own security; and by directing that industry in such a manner as its produce may be of the greatest value, he intends only his own gain, and he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention.”
The idea that self-interested behavior could contribute to the common good ran counter to the dominant economic wisdom of Smith’s era, especially on the topic of trade. The prevailing system in the eighteenth century was mercantilism, under which nations aimed to augment their wealth through a favorable balance of trade, aided by import quotas and tariffs. Thus, only the side that increased its stock of gold and silver—usually the exporter—was viewed as benefiting from a trade agreement. To build wealth, the great powers of the eighteenth century waged wars of conquest and restricted the economic freedom of their subjects, as Britain did by preventing the American colonies from trading with other countries.
But Smith, after traveling across Europe and observing how the Industrial Revolution had transformed economies, concluded that trade was more than a mere exchange of wealth—it actually creates wealth. “Smith completely demolished the mercantilist idea that in international trade there’s a winner and a loser,” Butler said. “Adam Smith said, ‘No, that’s not true. Both sides can benefit from the exchange.’”
In this way, Smith played a pivotal role in ushering in our modern era of free trade. But since his era, the ideas in The Wealth of Nations, and in particular the invisible hand, have become synonymous with capitalism more broadly. Free-market economists like Milton Friedman described the concept as “cooperation without coercion” and made the invisible hand a foundational component of economic theory.
Meanwhile, critics challenged the notion that the invisible hand could organize the market in the best possible way. Karl Marx facetiously likened the invisible hand to “the fate of the ancients”: an outdated, capricious system unconcerned with human welfare. He and many Marxian economists who followed, such as Oskar Lange and Abba Lerner, argued that government could more effectively direct the market toward what was best for the people.
It was within this climate of renewed distrust in the free market that economists like Ludwig von Mises and Friedrich A. Hayek mounted a renewed defense of Adam Smith’s ideas. Most notably, in a 1945 essay titled “The Use of Knowledge in Society,” Hayek illustrated how the invisible hand operates in modern, complex, decentralized markets.
To illustrate Hayek’s point, economist Russ Roberts presents a scenario involving graphite, a raw material produced only by mining firms and purchased solely by manufacturers of pencils and tennis rackets. A new application for graphite is discovered: graphite powder stabilizes friction and reduces heat buildup in brake pads. Now carmakers want large quantities of graphite. They enter the market, but the mining firms have only enough stock to supply the pencil and racket manufacturers.
Socialists would answer by appointing a “graphite commissioner” to decide the best allocation of graphite for everyone’s benefit. But Hayek noted that anyone in such a position would need an extraordinary amount of information to base decisions on.
For instance, could the commissioner compel pencil manufacturers to devise thinner pencils, or push car makers to use a different alloy? Might schools cut writing tasks, or could mining firms locate deposits richer in graphite? And what about the end consumer—the thousands who use pencils, tennis rackets, and cars—how easy would it be for them to alter their behavior to reduce graphite demand? These questions would demand a lifetime’s worth of research, yet the graphite commissioner would be tasked with turning the market toward everyone’s needs immediately.
“This is what Hayek identified as the fatal conceit—the belief that somehow we could be these all-knowing, omniscient beings that could control the economy,” George Mason University economics professor Peter J. Boettke told The Dispatch. “And instead, what happens is all of the knowledge … is created within the interaction of the market process itself.”
In a free market with no graphite commissioner, graphite prices would rise, signaling to the mining firms that graphite has become more valuable and driving them to seek ways to mine more of it. The price rise could also push pencil manufacturers to craft thinner pencils, prompt car producers to alter brake-pad designs, and lead tennis-racket makers to switch to carbon fiber. Even the back-to-school shopper described above participates in this process without realizing it; whatever choice the shopper makes in response to higher pencil prices sends a signal through the market about graphite demand.
“The marvel,” Hayek wrote, “is that in a case like that of a scarcity of one raw material, without an order being issued, without more than perhaps a handful of people knowing the cause, tens of thousands of people whose identity could not be ascertained by months of investigation, are made to use the material or its products more sparingly; i.e. they move in the right direction.”
All of us have participated in processes like this countless times; our preferences are woven into systems so intricate that no one fully understands them. Grocery stores stock more high-protein foods to reflect the broad use of GLP-1 drugs, the development of AI spawns a new type of “superconducting” electrical cable, and turkey farmers schedule their hatching cycles around Thanksgiving. Each person acts out of self-interest and, guided by the invisible hand, advances an outcome that was not part of their intention: the coordination of the free market as a whole.
As Adam Smith himself stated, “It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from their regard to their own interest. We address ourselves, not to their humanity but to their self-love, and never talk to them of our own necessities but of their advantages.”
