The Moral Case for Markets | Economics for the Curious

Six Moral Arguments for Markets

Markets respect freedom and consent.
Every market exchange is voluntary. No one is forced to buy, sell, or work for a particular employer. Markets treat people as adults who can judge what is good for their own lives, and letting people make those choices is itself a moral good. Critics reply that a choice made out of necessity, isn’t fully free.
In a market, you get ahead by serving others.
A baker who wants an income still has to bake bread you want, at a price you’ll pay. Trade is positive-sum: both sides expect to gain, or the trade doesn’t happen. The way to earn more is to make someone else better off.
Markets give ordinary people dignity and a chance to “have a go.”
Economist Deirdre McCloskey calls it the Bourgeois Deal: let ordinary people try their ideas, don’t resent the rewards that customers freely give them, and their innovations will make everyone better off. Status comes more from what you create, and less from birth or political connections, than in older societies.
Markets have helped lift billions out of poverty.
In 1990, about 44% of the world lived on less than $3 a day; by 2025, about 10% did. Defenders note that the biggest gains came as China, India, and other countries opened to markets and trade. Critics add that public health, schooling, and active governments also played a large part. Cheaper food, light, medicine, and phones matter most to people with the least.
Markets turn strangers into partners.
No one can make a pencil alone, yet millions of strangers cooperate to make one. Commerce gives people of different religions, politics, and nations a reason to deal fairly and peacefully with each other.
Markets reflect humility about what any one person knows, and they test every idea.
No planner knows what millions of people want or what each one knows about their own work and place. Prices pull that scattered knowledge together. A new idea isn’t proven just because its inventor, or a government, believes in it. Customers test it every day: profits signal it’s worth the resources it uses; losses signal it’s time to adapt or stop. Markets spread decisions out instead of trusting a few people with power over everyone else.

Does Trade Change How We Treat Strangers?

Argument 5 is an old idea. Voltaire, writing about London’s Royal Exchange in his Letters Concerning the English Nation (1733), put it this way, half seriously: “There the Jew, the Mahometan, and the Christian transact together, as though they all professed the same religion, and give the name of infidel to none but bankrupts.” What does the evidence say?

Experiments in 15 societies. Joseph Henrich and colleagues ran bargaining games with people in 15 very different societies, from African herders to Colombian fishermen to Missouri wage workers. People in societies that bought more of their food in markets made fairer offers to strangers.

Surveys across countries. Niclas Berggren and Therese Nilsson found that countries with more economic freedom showed more tolerance of gay people, but tolerance of people of other races was not strongly affected. In a later study of up to 106 countries, more economic openness went with more antisemitism, while a stronger rule of law went with less.

A lab market. Armin Falk and Nora Szech found that people were more willing to let a lab mouse die for money when they traded in a market than when they decided alone. Critics reply that one artificial market can’t show how real markets shape people.

Weighing it. The studies differ in strength. The survey studies show patterns, not proof of cause, and come mostly from one research team. Together, the evidence supports a weaker version of argument 5: trade tends to go with fairer treatment of strangers, especially where courts are fair and trusted, but it doesn’t erase every prejudice. How much that should count in the moral case for markets is a question of values.

Self-Interest Is Not Greed

“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.”

Adam Smith, The Wealth of Nations (1776)

Smith also wrote that however selfish people may be, they still care about the fortunes of others. Self-interest includes your family, your community, and your reputation. Markets reward honesty, reliability, and trust, because customers come back to sellers they trust.

The sentence after the butcher line matters too: “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.” To trade, each side has to think about what the other person wants. And Smith judged the result by how ordinary people live. The division of labor and trade, he wrote, produce “that universal opulence which extends itself to the lowest ranks of the people.”

Fair Objections and How Defenders Respond

Decide what you think of each challenge first, then open the response.

“Markets reward greed.”

Markets reward serving customers, and a seller who cheats loses repeat business and reputation. Greed exists under every system. Defenders argue markets channel it toward serving others, while concentrated political power gives it fewer checks.

“Markets create inequality.”

Markets let people grow rich by making others better off and rise regardless of birth. Defenders argue the key moral test is whether the poor are getting better off. Adam Smith set the same test: “No society can surely be flourishing and happy, of which the far greater part of the members are poor and miserable.” Markets also work alongside safety nets in mixed economies.

“Some people lose when trade and technology change.”

True. The gains are real but unevenly shared. The honest answer is to help displaced workers adjust, not to block changes that make most people better off.

“Markets put a price on everything.”

Markets don’t decide what we value; people do. Friendship, votes, and justice stay outside the market by choice, and should.

“Markets ignore harms like pollution.”

A fair point. When costs fall on people outside a trade, markets need rules that make the one causing the harm pay for it. Defenders argue for fixing the gap, not abandoning markets.

“Markets only test what people will pay for.”

Partly true. Basic research, cures for rare diseases, and things poorer buyers can’t afford can fail the market test and still matter. That is why universities, charities, and governments fund some of them. Defenders reply that political tests have blind spots too, and give fewer signals when an idea isn’t working.

What Critics Say Back

Serious critics come from different traditions. Most want limits on markets, not an end to them.

What Critics Say Back: Critic
Critic	The argument
Michael Sandel, Harvard political philosopher	Sandel doesn’t oppose a market economy, but argues we have “drifted from having a market economy to being a market society,” where money decides access to health care, good schools, and political influence.
Elizabeth Anderson, University of Michigan philosopher	Most workers don’t negotiate the terms of their jobs. Anderson argues that many employers govern workers’ speech, dress, and even off-duty lives with little accountability, a “private government.”
Wendell Berry, Kentucky farmer and essayist	Berry argues that a national and global economy draws wealth and people away from small towns, weakening local ties: “As local community decays along with local economy, a vast amnesia settles over the countryside.”

LISTEN What Is Capitalism? (with Mike Munger) and Adam Smith’s Warning About Wealth, Fame, and Status (with Ross Levine) on EconTalk, hosted by Russ Roberts, with transcripts

Key Terms in Plain Words

Voluntary exchange: A trade both sides freely agree to because each expects to gain.
Bourgeois Deal: McCloskey’s bargain: let people innovate, don’t resent their rewards, and everyone gets richer.
Positive-sum: An exchange where both sides end up better off; one side’s gain is not the other’s loss.
Price signals: Prices that carry information about scarcity and wants, coordinating millions of decisions.
Invisible hand: Adam Smith’s idea that people pursuing their own interests in markets often serve others without intending to.
Rule of law: Rules that apply equally to everyone, including property rights and enforceable contracts. Markets depend on it.
Self-interest: Caring about your own goals, family, and future. Not the same as greed, which ignores others.
Normative claim: A statement about what should be. Moral arguments about markets are normative.

Sources

Quotations and figures in this sheet come from the sources below.
Six Moral Arguments
Adam Smith, An Inquiry into the Nature and Causes of the Wealth of Nations (1776), Project Gutenberg gutenberg.org
Adam Smith, The Theory of Moral Sentiments (1759), Project Gutenberg gutenberg.org
Deirdre Nansen McCloskey and Art Carden, Leave Me Alone and I’ll Make You Rich: How the Bourgeois Deal Enriched the World, University of Chicago Press, 2020 press.uchicago.edu
World Bank, “Poverty and Inequality Update,” Fall 2025 thedocs.worldbank.org
World Bank, “Global Poverty Revisited Using 2021 PPPs and New Data on Consumption,” 2025 documents1.worldbank.org
Does Trade Change How We Treat Strangers?
Voltaire, Letters Concerning the English Nation (1733), Letter VI, “On the Presbyterians,” translated by John Lockman; National Constitution Center, Historic Document Library constitutioncenter.org
Joseph Henrich et al., “Markets, Religion, Community Size, and the Evolution of Fairness and Punishment,” Science 327 (2010): 1480–1484 science.org
Niclas Berggren and Therese Nilsson, “Does Economic Freedom Foster Tolerance?” Kyklos 66, no. 2 (2013): 177–207 doi.org
Niclas Berggren and Therese Nilsson, “Economic Freedom and Antisemitism,” Journal of Institutional Economics 17, no. 2 (2021): 289–304 (accepted version, Research Institute of Industrial Economics) ifn.se
Armin Falk and Nora Szech, “Morals and Markets,” Science 340 (2013): 707–711 science.org
Christoph Luetge and Hannes Rusch, “The Systematic Place of Morals in Markets,” letter, Science 341 (August 16, 2013): 714 science.org
What Critics Say Back
Michael J. Sandel, What Money Can’t Buy: The Moral Limits of Markets, Farrar, Straus and Giroux, 2012 sandel.scholars.harvard.edu
Elizabeth Anderson, Private Government: How Employers Rule Our Lives (and Why We Don’t Talk about It), Princeton University Press, 2017 press.princeton.edu
National Endowment for the Humanities, “Excerpts from the Writings of Wendell Berry,” Humanities, May/June 2012 neh.gov
Podcasts (Econtalk, Library Of Economics And Liberty, With Transcripts)
EconTalk, “What Is Capitalism? (with Mike Munger),” hosted by Russ Roberts, July 7, 2025 econtalk.org
EconTalk, “Adam Smith’s Warning About Wealth, Fame, and Status (with Ross Levine),” hosted by Russ Roberts, April 20, 2026 econtalk.org