Milton Friedman: Defender of Monetarism and the Free Market

From Brooklyn to Changing the World

If I had to name a single figure who, after Keynes, shaped 20th-century economic thought the most, I would without hesitation say Milton Friedman. But I should add immediately that, although Friedman is often positioned as Keynes's antithesis, the real picture is far more complex. Friedman transformed economics both theoretically and at the popular level, and his ideas have influenced — for better or worse — the lives of millions.

Milton Friedman was born on July 31, 1912, in Brooklyn, New York. His family was a Jewish family that had emigrated from Hungary. His father worked in a small shop and his mother was a seamstress. Material conditions were difficult, but the family placed great value on education. The young Milton stood out for his ability in mathematics and in debate during his high-school years.

At Rutgers University he studied mathematics and economics. There, under the influence of professors such as Arthur Burns and Homer Jones, he turned toward economics. He completed his master's degree at the University of Chicago and his doctorate at Columbia University. But his heart was always in Chicago — and in 1946 he returned to the University of Chicago, where he taught for thirty years.

The Chicago School: The Fortress of Market-Centered Thought

In the second half of the 20th century, the University of Chicago's Department of Economics became the center of market-centered economic thought. Friedman became the unquestioned leader and most influential voice of this school. Together with figures such as George Stigler, Gary Becker and Robert Lucas, Chicago built a strong intellectual alternative to Keynesian macroeconomics and to state intervention.

The core principles of the Chicago approach were: individual freedom begins with economic freedom; markets are far more efficient at allocating resources than the state; state intervention generally produces unintended negative consequences; and inflation is, above all, a monetary phenomenon.

These ideas were a radical challenge to the Keynesian consensus of the post-war period. Friedman pursued this challenge through both academic articles and popular writings — and was extraordinarily successful at it.

The Real Cause of the Great Depression: A Rewriting of History

The most important academic work of Friedman's career is "A Monetary History of the United States, 1867–1960" (1963), which he co-authored with Anna Schwartz. This book overturned the prevailing view of the causes of the Great Depression.

According to the Keynesian interpretation, the Great Depression was a product of the instability inherent in capitalism — the collapse of aggregate demand showed that the market economy could not correct itself. Friedman and Schwartz told a completely different story: the reason the Depression was so deep and so long was the disastrous mistakes of the Federal Reserve's monetary policy.

After the 1929 crash, the Fed contracted the money supply. As banks failed one after another, the Fed did not fulfill its role as lender of last resort. This turned a normal recession into the largest economic catastrophe in history. In Friedman's famous words: "The Great Depression is proof not of the failure of the free market but of the failure of government."

This argument had an earthquake-like effect on the writing of economic history and propelled Friedman to the position of undisputed leader of monetarism.

Monetarism: Money Is Everything

Friedman's monetarism rested on several core propositions. The first and most famous: "Inflation is always and everywhere a monetary phenomenon." That is, the sole cause of a continuous rise in the general price level is an expansion of the money supply faster than the growth of the economy.

The second proposition was that monetary policy works with "long and variable lags." A decision the central bank takes today can affect the economy six months, a year, or even two years later. This lag made active monetary policy extremely risky — well-intentioned interventions could destabilize the economy further because of timing errors.

For this reason Friedman proposed that, instead of pursuing activist monetary policy, central banks should follow a simple rule: increase the money supply at a fixed rate each year — for example, three to five percent. This "k-percent rule" would protect the economy from both inflation and deflation.

The Permanent Income Hypothesis

Another important theoretical contribution from Friedman was the permanent-income hypothesis, presented in his 1957 book "A Theory of the Consumption Function." Keynes had argued that people's consumption is determined by their current income. Friedman, in contrast, proposed that people adjust their spending not to current income but to their long-term (permanent) income expectations.

This difference had major policy consequences. According to the Keynesian view, a temporary tax cut would boost consumption. According to Friedman, people direct temporary income increases into saving, and adjust their spending only to changes in income they perceive as permanent. For this reason, Keynesian fiscal policy was, in Friedman's view, much less effective than supposed.

The Natural Rate of Unemployment

In 1968, the concept of the "natural rate of unemployment," which Friedman developed independently of Edmund Phelps, dealt another blow to Keynesian economics. The Phillips curve implied a permanent inverse relationship between inflation and unemployment — governments could permanently lower unemployment by accepting slightly higher inflation.

Friedman rejected this view. In the short run such a trade-off might exist, but in the long run people would adjust their inflation expectations and unemployment would return to its natural rate — only now with higher inflation. This analysis was dramatically vindicated by the stagflation of the 1970s.

Free to Choose: Bringing Economics to the Public

One of Friedman's most striking gifts was his ability to explain complex economic ideas in language ordinary people could understand. The book "Free to Choose," written in 1980 with his wife Rose Friedman, and the PBS television series of the same name, brought economic ideas to millions of people.

The book and series explained the benefits of free markets with concrete examples: how the materials and labor needed to make a pencil are coordinated from all over the world, without anyone planning it; how the price mechanism works as a means of communication; how the unintended consequences of government intervention arise.

Friedman also made many unconventional policy proposals. He championed a school voucher system — instead of public schools, families would receive vouchers to choose the school they wanted. He opposed military conscription and championed a professional army. He proposed the abolition of the war on drugs. And, perhaps most surprisingly, he developed the idea of a negative income tax — a direct cash transfer from the state to those below a certain income level. This idea was the forerunner of today's debates about universal basic income.

The Case for Floating Exchange Rates

Friedman was one of the most influential voices arguing that the fixed exchange-rate system was unsustainable and that currencies should be determined by market forces. His 1953 article "The Case for Flexible Exchange Rates" was a direct challenge to the Bretton Woods system of the day.

According to Friedman, the fixed exchange-rate system prevented countries from running an independent monetary policy and inevitably led to crises. Floating exchange rates, by contrast, would work as a shock absorber, correcting external-trade imbalances through the market mechanism. The collapse of Bretton Woods in 1971 and the subsequent move to floating rates vindicated Friedman's foresight on this issue.

Nobel 1976 and Global Impact

Friedman received the Nobel Prize in Economics in 1976. The citation noted his contributions to "consumption analysis, monetary history and theory, and demonstrating the complexity of stabilization policy."

Friedman's ideas directly shaped world politics in the 1980s. In the United States Ronald Reagan, and in the United Kingdom Margaret Thatcher, were deeply influenced by Friedman's free-market philosophy. Deregulation, privatization, tax cuts, and tight monetary policy — the policies known as "Reaganomics" and "Thatcherism" — were largely Friedman's intellectual legacy.

The Chile Controversy: A Dark Side of Freedom?

The most controversial chapter in Friedman's career is his relationship with Chile. In 1975, Friedman visited Chile, where Augusto Pinochet had taken power through a military coup, and met with Pinochet. Chilean economists trained at the University of Chicago — the "Chicago Boys" — were shaping the economic policies of the Pinochet regime.

Friedman argued that his visit was not a political endorsement and that he had merely offered economic advice. He maintained that Chile's economic liberalization contributed in the long run both to economic growth and to political liberalization. Critics, however, said he had lent economic legitimacy to a dictatorship and turned a blind eye to human-rights abuses.

This debate continues to this day and remains one of the most complex aspects of Friedman's legacy. With respect to the relationship between economic and political freedom, Friedman's thesis that "economic freedom is a precondition for political freedom" finds both supporting and challenging evidence in the case of Chile.

The Great Debate with the Keynesians

The debate between Friedman and the Keynesian economists was one of the most productive intellectual confrontations of 20th-century economics. The interesting thing is that Friedman personally regarded Keynes as a great economist — what he criticized was more the policy approach that had become institutionalized as "Keynesianism."

The essence of the debate was this: the Keynesians argued that the source of economic instability is the private sector and that state intervention is necessary, while Friedman maintained that economic instability is largely caused by mistaken policies of the state (particularly the central bank).

Looking back today, we can say that both sides were partly right. Neither do markets always work perfectly, nor is government intervention always beneficial. The truth lies somewhere between these two extremes — and modern macroeconomics draws on the contributions of both traditions.

Legacy and Assessment

Milton Friedman died on November 16, 2006, in San Francisco. He left behind an enormous intellectual legacy. The strict form of monetarism — a fixed monetary-growth rule — is rarely applied today; central banks have adopted more flexible approaches. But Friedman's core ideas — that inflation is a monetary phenomenon, the importance of expectations, the limits of government intervention — have become inseparable parts of modern macroeconomics.

Whatever we think of Friedman, his contribution to economic science and to public debate is undeniable. Even if you disagree with his ideas, you have to engage with him intellectually — and that is the greatest measure of a thinker's success.