Paying tribute to one of the more original theorist of the late 20th and early 21st century, Rational Radicalism and Political Theory probes the thought of Stephen Eric Bronner. This collection of essays encompasses themes such as the Enlightenment's radical legacy, the impulse of cosmopolitanism, the rejuvenation of socialist theory and politics, and advances in Critical Theory. These essays make new contributions to many areas of left political theory, while at the same time reflecting on the ways Stephen Bronner's ideas serve to generate a new kind of critical political theory. Blending political and intellectual history, normative and moral argumentation, and forays into the nature of politics itself, this book brings together new voices in political theory to assess Bronner's contributions and pave new paths for the future of political theory.