The origin of the Austrian School of economics is the publication of Carl Menger’s Principles of Economics in 1871. Menger, William Stanley Jevons, and Léon Walras are considered the co-founders of the “marginal revolution” in economics, a shift to the marginal utility theory of value from the labour theory of value. The revolutionists argued that value is not based on the amount of labour expended but reflects how useful people perceive the commodity to be in satisfying their ends.