Jean-Baptiste Say
Last updated: 2026-04-27
This article is part of the Basic Course on Libertarianism and the Austrian School of Economics-> Module 4: Main Schools of Economics
Life, work, and main contributions
Jean-Baptiste Say (1767–1832) is the great French heir of Cantillon and another fundamental pillar that the Austrians recovered against the “obscurity” of the British classicals.
If Cantillon was the “father,” Say was the one who professionalized economic analysis, moving it away from mathematical abstractions and focusing it on the reality of human action.
Main work
- A Treatise on Political Economy (1803, with multiple editions). It was the most influential economics manual on the European continent for decades. Clearer and more systematic than Smith’s The Wealth of Nations in several respects.
- Other works: Letters to Malthus, A Complete Course of Practical Political Economy, etc.
1. Say’s Law (The Law of Markets)
Often misinterpreted as supply creates its own demand, the true essence of his law is much deeper for an Austrian: Products are paid for with products.
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The concept: For you to be able to buy a pair of shoes (demand), you first had to produce something of value (software, a piece of furniture, a service) to exchange for it.
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Consequence: Money is only an intermediary. People’s purchasing power is born of their capacity to produce. Therefore, to get out of a crisis, one must not “stimulate consumption” by printing money, but foster production by removing obstacles.
2. Subjective Value (Against Smith and Ricardo)
While in England Adam Smith was lost in the labor theory of value, Say held firm to the continental tradition: the value of a good depends on its utility to the consumer.
- “The value of things does not reside in the labor they cost, but in the utility they have for whoever desires them.”
This stance was what allowed Menger, decades later, to finish the task and found the Austrian School. Say understood that economics was a science of means and ends, not of physical measures of effort.
3. The Entrepreneur as “Organizer”
Say was the first to give the entrepreneur a place of honor, clearly distinguishing him from the capitalist (the one who puts up the money).
- For Say, the entrepreneur is the “agent of change” who combines land, labor, and capital to create something the public values.
- He is the one who assumes the risk that his judgment about what people want may be wrong.
4. Methodology: “Good Sense”
Say rejected the use of complex mathematics in economics (something the Austrians applaud). He believed that economics should be based on logical deduction starting from evident facts of human nature. He said that economic laws are as immutable as those of physics, but are discovered through observation and reasoning, not equations.
His connection with the Austrians
Murray Rothbard considered him a direct precursor because:
- He defended the free market in a radical way.
- He understood that public spending does not generate wealth, but consumes it.
- He put the consumer and the entrepreneur at the center of the analysis.
In fact, it is very likely that, without the influence of Say’s French school, the Austrian School would never have had the tools to refute Marxism and its obsession with the labor theory of value.
This article is part of the Basic Course on Libertarianism and the Austrian School of Economics-> Module 4: Main Schools of Economics
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Last updated: 2026-04-27
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