What are moral rights? What role do they play in liberalism? Which rights do we have? Does the language of rights impose formal constraints? Which rights and duties does equality force us to acknowledge? Are rights universal or culture-bound? How should global institutions promote human rights? These are the central questions discussed in this volume. All the contributors are leading figures in moral, legal, or political philosophy, and their papers are published here for the first time. The reader will therefore find in this volume a unique opportunity to acquire a direct acquaintance with some of the most recent developments in the above fields. Although the general tone of the contributions is polemical and rigorous, most of the material will be useful to the specialized reader as well as to the university student.