In this collection of essays, the first translation into English of the ground-breaking Normativitat und Macht (Suhrkamp 2015), Rainer Forst presents a new approach to critical theory. Each essay reflects on the basic principles that guide our normative thinking. Forst's argument goes beyond 'ideal' and 'realist' theories and shows how closely the concepts of normativity and power are interrelated, and how power rests on the capacity to influence, determine, and possibly restrict the space of justifications for others. By combining insights from the disciplines of philosophy, history, and the social sciences, Forst revaluates theories of justice, as well as of power, and provides the tools for a critical theory of relations of justification.