In this collection of essays, Onora O'Neill argues for an account of justice that is fundamentally cosmopolitan rather than civic, yet takes serious account of institutions and boundaries, and of human diversity and vulnerability. She explores the question of whether the claims and scope of justice are limited by culturally or politically specific concepts and views, and examines the demands and scope of just institutions and the possibility of a world with porous boundaries and dispersed power. Bounds of Justice will appeal to readers in philosophy, politics and international relations.