"Carl Menger was a civil servant in the prime minister's office at Vienna when at the age of thirty-one he published his first and decisive work, Principles of Economics. It was the first part of an intended treatise, the rest of which never appeared. It dealt with the general conditions that create economic activity, value, exchange, price, and money. What made it so effective was that the explanation of value it offered arose from an analysis of the conditions determining the distribution of scarce goods among competing uses and of the way in which different goods competed or cooperated for the satisfaction of different needs—in short, what has been called above the 'means-ends structure'. It is this analysis that precedes the theory of value proper. Friedrich von Wieser was to develop this systematically into a vorwerttheoretische part of economic theory that made the Austrian form of marginal utility analysis so suitable as a basis of further development. From this analysis springs most of what is known today as the logic of choice, or the 'economic calculus'. Menger's exposition is generally characterised more by painstaking detail and relentless pursuit of the important points than by elegance or the use of graphic terms to express his conclusions. Though always clear, it is laboured, and it is doubtful whether his doctrines would ever have had wide appeal in the form in which he stated them. However, he had the good fortune of finding at once avid and gifted readers in two young men who had left the University of Vienna some time before Menger became a professor there. They decided to make the fulfillment of his teaching their lifework. It was mainly through the work of Eugen von Böhm-Bawerk and Friedrich von Wieser, classmates and later brothers-in-law, that Menger's ideas were developed and spread. Gradually during the 1880s, when their most influential works appeared, they were joined by others working in the universities or elsewhere in Austria. Of these, Emil Sax (1845–1927), Robert Zuckerkandl (1856–1926), Johann von Komorzynski (1843–1912), Viktor Mataja (1857–1933), and Robert Meyer (1855–1914) particularly deserve mention. Somewhat later came Hermann von Schullern zu Schrattenhofen (1861–1931) and Richard Schüller (1871–1972). The year 1889, in which the greatest number of important publications of the group were concentrated, also saw the appearance of an important theoretical treatise by two Viennese businessmen, Rudolf Auspitz and Richard Lieben, Untersuchungen über die Theorie des Preises. This can, however, only with qualifications be included in the works of the Austrian school. It moved on parallel but wholly independent lines and with its highly mathematical exposition was too difficult for most contemporary economists, so that its importance was recognised only much later. Of great importance for spreading the teachings of the school, especially in Germany, was the fact that another Viennese professor, Eugen von Philippovich von Philippsberg (1858–1917), though not himself an active theoretician, incorporated the marginal utility doctrine into a very successful textbook, Grundriß der politischen Okonomie. For some twenty years after publication this remained the most widely used textbook in Germany and almost the only channel through which the marginal utility doctrine became known there. In other foreign countries, especially England, the United States, Italy, the Netherlands, and the Scandinavian countries, the basic economic publications of the Austrians became known sooner, partly in English translations. Probably the most important foreign adherent was an exact contemporary of Böhm-Bawerk and Wieser, the Swede Knut Wicksell. Although he was also greatly indebted to Walras, Wicksell could write in 1921 that "since Ricardo's Principles there has been no other book—not even excepting Jevons's brilliant but somewhat aphoristic and Walras's unfortunately difficult work—which has had such a great influence on the development of economics as Menger's Grundsätze"."