Three Economists, One Idea: How Marginal Utility Was Discovered Three Times

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

Historians of economic thought still find the coincidence remarkable. Between 1871 and 1874, three economists working in three countries, unaware of each other's writing, published the same core idea: that economic value is set at the margin, by the last unit consumed, not by the total labor a good required to produce. Carl Menger wrote from Vienna, William Stanley Jevons from Manchester, and Leon Walras from Lausanne, each arriving at marginal utility from a different starting problem, Menger from a theory of goods and needs, Jevons from a mathematical treatment of pleasure and pain, Walras from a general equilibrium system of interrelated markets. None of the three had read the others' work before publishing. The episode is often cited as a case of an idea whose time had come, ripe within the broader shift toward mathematical and psychological reasoning in the social sciences of the period. What the three discoveries share matters more than how each arrived there: all three replaced the classical labor theory of value with a theory grounded in individual, marginal, subjective judgment, a reframing so complete that economics before and after 1871 are often taught as different disciplines.