This book builds on the recent revival of interest in Marx and Marxism, calling for a renewal and refinement of Marxist state theory. It aims to provoke and encourage new debates and critiques that build on—but also update and extend—the rich tradition of Marxist analyses of the capitalist state, including the well-known debates of the 1970s. The chapters present a dynamic and diverse constellation of arguments and perspectives on a range of topics, from general re-appraisals of the capitalist state to investigations of contemporary challenges—including digitalisation, the ecological crisis, the coronavirus pandemic, social reproduction, and critical political economy. What they share is a commitment to an understanding of the specifically capitalist character of the modern state and its significance for any serious discussion of the causes of our current age of global catastrophe and the overcoming of capitalist social relations.