Philip Wicksteed, English philosopher, theologian, and economist, made important advances in economic method and in the theory of marginal productivity. He also emphasized the subjectivism of costs. His use of mathematics and graphical analysis, coupled with a lively writing style, made these tools more accessible to students. He influenced many 20th century economists, particularly those working in the Austrian tradition.
Ludwig von Mises: "Despots and democratic majorities are drunk with power. They must reluctantly admit that they are subject to the laws of nature. But they reject the very notion of economic law . . . economic history is a long record of government policies that failed because they were designed with a bold disregard for the laws of economics." - Austrian Economics: An Anthology