Carl Menger (February 28, 1840 – February 26, 1921) was the founder of the Austrian School of economics, famous for contributing to the development of the theory of marginal utility, which contested the cost-of-production theories of value, developed by the classical economists such as Adam Smith and David Ricardo.
He noticed a discrepancy between what the classical economics he was taught in school said about price determination and what real world market participants believed. In 1867 Menger began a study of political economy which culminated in 1871 with the publication of his Principles of Economics (Grundsätze der Volkswirtschaftslehre), thus becoming the father of the Austrian School of economic thought. It was in this work that he challenged classical cost-based theories of value with his theory of marginality - that price is determined at the margin.
He set about refining and defending the positions he took and methods he utilized in Principles, the result of which was the 1883 publication of Investigations into the Method of the Social Sciences with Special Reference to Economics (Untersuchungen über die Methode der Socialwissenschaften und der politischen Oekonomie insbesondere). The book caused a firestorm of debate, during which members of the Historical school of economics began to derisively call Menger and his students the "Austrian School" to emphasize their departure from mainstream economic thought in Germany. In 1884 Menger responded with the pamphlet The Errors of Historicism in German Economics and launched the infamous Methodenstreit, or methodological debate, between the Historical School and the Austrian School. During this time Menger began to attract like-minded disciples who would go on to make their own mark on the field of economics, most notably Eugen von Böhm-Bawerk, and Friedrich von Wieser.
Over the course of the next decade he authored a plethora of articles which would revolutionize monetary theory, including "The Theory of Capital" (1888) and "Money" (1892).