German sociologist Max Weber’s 1919 lecture Politics as a Vocation 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...