This is a book about how conceptions of the modern state, politics and the political were understood, developed and modified by Max Weber (1864–1920), Carl Schmitt (1888–1985) and Franz Neumann (1900–1954) during the period 1890 to 1945 in Germany. It is an attempt to outline their criticisms and modifications of a broad, peculiarly German tradition of Staatsrechtslehre, or state-legal theorizing. The predominantly legalistic nature of this type of thinking forms both the background to, and the bases of, the understandings of the modern state and politics found in their writings. Yet, all three writers argued that such thinking could not adequately adapt to the problems raised by an era of mass-based politics. Tracing the reasoning behind their movement away from this broad tradition of Staatsrechtslehre therefore provides an overarching context for this work.