One of the most influential Marxist theorists of the twentieth century, Henri Lefebvre pioneered the study of the modern state in an age of accelerating global economic integration and fragmentation. Shortly after the 1974 publication of his landmark book The Production of Space, Lefebvre embarked on one of the most ambitious projects of his career: a consideration of the history and geographies of the modern state through a monumental study that linked several disciplines, including political science, sociology, geography, and history.