This book collects nine of the most important articles published in the last twenty years on the subject of rights--their nature, content, and justification--in philosophy, jurisprudence, and political theory. Contributors include Margaret MacDonald, Gregory Vlastos, H.L.A. Hart, Alan Gewirth, David Lyons, T.M. Scanlon, Ronald Dworkin, J.L. Mackie, and Joseph Raz.