An appendix to the volume includes a curriculum vitae that Mises’s great-grandfather prepared for the Habsburg emperor in 1881 as part of his ennoblement, which gave him and his heirs the hereditary title of “Edler von.” Also included is a talk that Mises delivered at his private seminar in his office at the Vienna Chamber of Commerce in the spring of 1934 on the topic of the methodology of the social sciences. (1881–1973) was the leading spokesman of the Austrian School of economics throughout most of the twentieth century. is Professor of Economics at Northwood University.