There can be no doubt among competent historians that if … the Austrian School has occupied an almost unique position in the development of economic science, this is entirely due to the foundations laid by this one man…. [I]ts fundamental ideas belong fully and wholly to [?]…. [W]hat is common to the members of the Austrian School, what constitutes their peculiarity and provided the foundations for their later contributions is their acceptance of the teaching of [?]. —F. A. Hayek
Who was Hayek writing about?
Carl Menger, of course. Menger (1840-1921), a professor at the University of Vienna, launched the Austrian school of economics with his trail-blazing Principles of Economics, published in 1871. (It was not translated into English until 1950.) He is famous for being one of three economists who independently and nearly simultaneously shifted economics onto a radically different track: marginal utility. Hence, the term marginal revolution in economics.
This was a radical recasting of value and price theory. “The value of goods arises from their relationship to our needs, and is not inherent in the goods themselves. With changes in this relationship, value arises and disappears…,” Menger wrote. “It is a judgment economizing men make about the importance of the goods at their disposal for the maintenance of their lives and well-being.” Menger was not a moral philosopher but an economist, explaining how human action generates market phenomena such as prices….
If only he could see what reason, capital accumulation, division of labor, and trade have wrought! The lesson we should take from Menger is that all government actions that obstruct the formation of capital and free exchange—such as tariffs, to pick a random example—torpedo human welfare.
Menger was one of the triumvirate of the subjectivist-marginalist revolution in economics. His theories and thoughts led to the latter Austrian school of economics branching off from mainstream economics into its own science of praxeology. He criticized Adam Smith for not going far enough to project the idea of higher order goods into his theory. He is the founder of the Austrian school of economics from which Nobel prize winner in economics, F.A. Hayek evolved his theories. Just being a bit subjective here, I think the Austrian school of economics is the only reasonable school of economics.