German sociologist Max Weber’s 1919 lecture Politics as a V ocation is widely regarded as a masterpiece of political theory and sociology. Its central strength lies in Weber’s deployment of masterful interpretative skills to power his discussion of modern politics. Interpretation involves understanding both the meaning of evidence and the meaning of terms – questioning definitions, clarifying terms and processes, and supplying good, clear definitions of the author’s own. As a sociologist accustomed to working with historical evidence, Weber based his own work on precisely these skills, solidly backed up by analytical acuity. Politics as a Vocation , written in a Germany shocked by its crippling defeat in World War I, saw Weber turn his eye to an examination of how the modern nation state emerged, and the different ways in which it can be run – interpreting and defining the different types of rule that are possible. It is testament to Weber’s interpretative skills that Politics is famous above all in sociological circles for its clear definition of a state as an institution that claims “the monopoly of legitimate physical violence” in a given territory. Dr Tom McClean received his PhD in politics from the London School of Economics, where he subsequently held a fellowship in Political Sociology. He currently works for the Uniting Centre for Research, Innovation and Advocacy in Sydney, Australia. Dr Jason Xidias has held positions at King’s College London and the University of California, Berkeley. William Brett was a member of the Constitution Unit at University College London and is currently Head of Campaigns for the Electoral Reform Society.