Montaigne's Fallacy
This article is part of the Basic Liberalism Course -> Module 7: Distortions of the Free Market
Last updated: 2026-05-30
In reality, it is not a theorem in the mathematical sense (like a proven theorem), but an idea or philosophical statement. It is mainly known as:
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Montaigne's Dogma
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Montaigne's Fallacy
Ludwig von Mises was the one who gave it this name in his work Human Action, criticizing it harshly.
Origin
Michel de Montaigne (1533-1592), the famous French Renaissance essayist, wrote in his Essays a phrase that summarizes the idea:
“No one gains except at the expense of another” or "One's profit is another's loss"
Montaigne maintained that in society, especially in the economic and commercial sphere, the gain of one person necessarily implies the loss of another. That is, he saw the economy as a zero-sum game.
What does this mean in practice?
According to this view:
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If a merchant makes money by selling something, it is because the buyer lost.
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If a country enriches itself through foreign trade, it is because another country became impoverished.
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Total wealth is fixed, and it can only be redistributed, never created.
This idea is the intellectual basis of mercantilism, Bullionism and many forms of protectionist and anti-capitalist thought that we have been discussing.
The critique from the Austrian School (and serious economics)
Mises, Hayek, Bastiat and Rothbard consider this one of the oldest and most harmful fallacies in the history of economic thought.
Why is it false?
Voluntary exchange is a positive-sum game
When two people exchange freely, both win. Each gives something they value less for something they value more (subjective theory of value).
Simple examples:
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You have an apple and I have a pencil. You prefer the pencil and I prefer the apple. After the barter, both of us are better off. There was no loser.
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When you buy a coffee for 3 dollars, Montaigne would say that you won the coffee and the cafeteria lost the coffee (or vice versa with the money). The Austrians show that what is behind it is an asymmetric valuation. You value the coffee more than the 3 dollars; the merchant values the 3 dollars more than the coffee. Both come out of the exchange in a subjectively better position than before making it.
Wealth is created
Thanks to the division of labor, specialization, entrepreneurship and capital, humanity generates more value than existed before. It is not a fixed pie.
The free market creates new wealth, continuously expanding the size of the social pie.
Historical consequences
This fallacy justified:
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Mercantilism and colonialism.
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Protectionist policies (“if I import, I destroy local jobs”).
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Many modern criticisms of capitalism (“the rich get rich at the expense of the poor”).
The Biological and Evolutionary Perspective: The bias of the primitive brain
Why, if Montaigne's Theorem is economically false, does it seem so intuitive and seductive to us? Here is where the integrated approach with evolutionary biology sheds light on the behavior of our species:
During 99% of the evolutionary history of hominids (the Paleolithic), human beings lived in small nomadic tribes of hunter-gatherers. In that ancestral primitive environment, the economy was indeed zero-sum. If one tribe collected the fruits from a tree or hunted a mammoth, those biological resources immediately became unavailable to the rival tribe. There was no private property, intertemporal accumulation of capital or mass production.
Our brains evolved shaped by pressures of absolute natural scarcity and violent competition for fixed resources. Therefore, humanity carries an evolutionary cognitive bias of zero-sum.
Montaigne's Theorem is nothing more than the philosophical codification of a primitive Paleolithic instinct that is hard for us to deactivate, preventing us from intuitively seeing the counterintuitive, sophisticated and peaceful character of the spontaneous order of the modern market.
In summary:
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Montaigne's Dogma is the intuitive but erroneous belief that the economy is a fight to divide a pie of fixed size.
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The Austrian School responds: the pie can be enlarged —and that is precisely the great contribution of free market capitalism.
This fallacy is still very much alive today: it is behind a large part of populism, economic nationalism and certain currents of the left when they talk about “exploitation”.
This article is part of the Basic Liberalism Course -> Module 7: Distortions of the Free Market
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Last updated: 2026-05-30
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