Milton Friedman

Father of monetarism and the most eloquent defender of free markets, who changed the world's understanding of capitalism through accessible language

Milton Friedman (1912-2006) was one of the most influential economists of the 20th century, the intellectual soul of the University of Chicago economics department, and the founder of monetarist economics. His A Monetary History of the United States (co-authored with Anna Schwartz, 1963) reinterpreted the causes of the Great Depression — not as market failure but as Federal Reserve monetary policy error — fundamentally undermining Keynesian faith in fiscal policy. Capitalism and Freedom (1962) systematized free-market ideas, proposing specific policy prescriptions including the negative income tax, school vouchers, and floating exchange rates, becoming the blueprint for modern libertarian policy. Free to Choose (1980), accompanied by a TV series of the same name, brought economic liberalism to mass audiences and became the intellectual foundation of the Reagan-Thatcher era. Friedman won the Nobel Prize in Economics in 1976, served as an adviser to President Reagan, and his ideas profoundly influenced economic reforms in Chile, Britain, the United States, and beyond. He believed: inflation is always and everywhere a monetary phenomenon, freedom is humanity's highest value, and government intervention almost always does more harm than good.

Methodologies

Monetary Diagnosis Tool: Explaining Economic Anomalies with Money Supply - When the economy experiences inflation or severe recession, first examine changes in money supply rather than seeking explanations in market failure or external shocks.
Policy Perverse Effects Analysis: Why Good Intentions Produce Bad Results - When evaluating any government policy, look not only at its intentions but ask: what is the incentive structure of this policy? What unintended consequences will it produce?

Key decisions and timeline

Born in Brooklyn, New York, to Jewish immigrant family - Economic hardship is often the soil from which great economists emerge; lived experience motivates research more powerfully than textbooks
Joins National Bureau of Economic Research, beginning empirical research training - Solid empirical training is the prerequisite for building reliable economic theory; data collection itself is an important scholarly contribution
Joins University of Chicago economics department, begins shaping the Chicago School - Persisting in dissent outside the academic mainstream, when backed by solid theory and empirical evidence, will ultimately change the mainstream

Beliefs and mental models

Inflation Is Always and Everywhere a Monetary Phenomenon - Inflation is not caused by unions, oil crises, or corporate greed, but by excessive growth in the money supply. The only effective way to control inflation is to control the rate of money supply growth, matching it to real economic growth. This proposition fundamentally overturned Keynesian explanations of inflation and laid the foundation for monetary policy rules.
Free Markets Are the Optimal Mechanism for Coordinating Human Action - The price system is a remarkable mechanism that can aggregate the dispersed knowledge and preferences of millions of people into coordinated action without any central command. Any attempt to replace the price mechanism with government planning inevitably leads to information waste and efficiency loss. Voluntary exchange is the only institution that simultaneously promotes economic efficiency and protects individual freedom.
Government Intervention Almost Always Does More Harm Than Good - Government programs often produce effects opposite to their intentions: minimum wage laws hurt the low-skilled workers who need help most; rent control causes housing shortages; tariffs protect not workers but inefficient firms. Government failure is more pervasive and harder to correct than market failure, because government lacks price signals and competitive pressure to correct mistakes.
Monetary History Framework: Testing Monetary Theory with Long-Cycle Data - By studying long-cycle monetary history data, identify systematic relationships between money supply changes and economic cycles, rather than relying on short-term observations or theoretical inference.
Permanent Income Hypothesis: Long-Term View of Consumption Behavior - People's consumption decisions are based on long-term average expected income (permanent income), not current income, which explains why short-term fiscal stimulus has limited effect.
Natural Rate of Unemployment: The Long-Run Illusion of the Inflation-Unemployment Trade-off - The Phillips Curve (negative correlation between inflation and unemployment) only exists in the short run; in the long run, policies attempting to trade inflation for lower unemployment only produce ever-higher inflation, while unemployment returns to its natural rate.

Sources

Capitalism and Freedom by Milton Friedman, University of Chicago Press, 1962
Free to Choose by Milton and Rose Friedman, Harcourt, 1980
A Monetary History of the United States, 1867-1960 by Milton Friedman and Anna J. Schwartz, Princeton University Press, 1963
The Role of Monetary Policy by Milton Friedman, American Economic Review, Vol. 58, No. 1, March 1968
Milton Friedman: A Biography by Lanny Ebenstein, Palgrave Macmillan, 2007
The Friedman-Savage Utility Function, Journal of Political Economy, 1948
Two Lucky People: Memoirs by Milton and Rose D. Friedman, University of Chicago Press, 1998