Ralph Miliband was a leading contributor to the development of Marxist political theory in the late twentieth century. His writings remain highly influential in contemporary work on the state and related areas of political theory and political sociology. This collection of new essays re-examines and evaluates the central themes in Miliband's work. It provides an essential reference point for research within the Marxist tradition, and a valuable resource for students on a range of courses in political and social theory.