Ludwig Von Mises is consensually seen as the father of modern libertarianism, but little is known about the deeper roots of his uncompromising laissez-faire way of thinking. This dissertation tries...Show moreLudwig Von Mises is consensually seen as the father of modern libertarianism, but little is known about the deeper roots of his uncompromising laissez-faire way of thinking. This dissertation tries to present a better understanding of the origins of Mises thought and, more particularly, how Mises, from a very technical economist before the First World War, turned into an ideologist in his book Nation, State, and Economy (1919). Through a careful description of the historical background an analysis of the evolution of his political thought from 1907 to 1919, it is argued that the three Mises’ main biographies, from Jörg Hülsmann, Murray Rothbard, and from Mises himself, interpreted his pre-war ideas in a teleological and anachronistic manner by applying posterior concepts that did not hold before the war. The main conclusion of this thesis is that Mises shifted from a technician to an ideologist as a reaction against the First World War and the excessive centralization of the Austro-Hungarian Empire. After suggesting that the psychological roots of this shift should be explored, it is also argued that Mises is, in the end, conceptually mimicking the socialists he criticizes, and that the second wave of the Austrian School starts not in the twenties, but in 1919 with Nation, State, and Economy.Show less