Marie-Esprit-Léon Walras was a French mathematical economist and Georgist. He formulated the marginal theory of value and pioneered the development of general equilibrium theory. Walras is best known for his book Éléments d'économie politique pure, a work that has contributed greatly to the mathematization of economics through the concept of general equilibrium. The definition of the role of the entrepreneur found in it was also taken up and amplified by Joseph Schumpeter.
The grave of Walras and his daughter Marie Aline (1869-1942) at the cemetery of Clarens in the Swiss canton of Vaud.
Georgism, also called in modern times Geoism, and known historically as the single tax movement, is an economic ideology holding that people should own the value that they produce themselves, while the economic rent derived from land—including from all natural resources, the commons, and urban locations—should belong equally to all members of society. Developed from the writings of American economist and social reformer Henry George, the Georgist paradigm seeks solutions to social and ecological problems, based on principles of land rights and public finance that attempt to integrate economic efficiency with social justice.
Georgist single tax poster published in The Public, a Chicago newspaper (c. 1910–1914)
1914 billboard citing Henry George in Rockford, Illinois
Henry George School of Social Science in New York City