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William Stanley Jevons

Original nameWilliam Stanley Jevons

One of the three of the "marginal revolution," who rewrote economics with mathematics

The First to Read "Where Wealth Comes From" · The Birth of Economics
Marginal RevolutionMarginal UtilityMathematical EconomicsEngland

Who they are

A nineteenth-century English economist, one of the three independent founders of the "marginal revolution" (the others being Menger of Austria and Walras of France). Where classical economics explained the value of a good by "labor," Jevons and the others held instead that its value depends on the "marginal utility" it gives the consumer — the added satisfaction from consuming one more unit. This shift from "cost of production" to "subjective utility" wholly remade the foundations of economics. He also strongly advocated mathematical tools for the study of the economy, a pioneer of modern mathematical economics.

Primary sourcesJevons, The Theory of Political Economy

Key stories

Why Diamonds Cost More Than Water

Classical economics had long been puzzled by a paradox: water is essential to life yet nearly free, while diamonds are useless yet fabulously dear. The marginal revolution gave the elegant answer: value depends not on total usefulness but on the "margin" — water is so plentiful that one more cup hardly matters (very low marginal utility), while diamonds are so scarce that one more is precious (very high marginal utility). This "marginal" view became the core tool by which modern economics analyzes every choice.

Relationships

Ally
🇦🇹Carl Menger　one of the three independent founders of the "marginal revolution"

Echoes today

Below are how modern works borrow or reinterpret this name or story — not the original material. The two differ, so keep them apart.

The "marginal revolution" and the diamond-water paradoxThe marginal-utility theory of Jevons and others solved classical economics’ "diamond-water paradox," moving economics’ foundation from "labor value" to "subjective utility," one of the starting points of modern microeconomics.
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