Winner of the 1975 National Book Award, this brilliant and widely acclaimed book is a powerful philosophical challenge to the most widely held political and social positions of our age--liberal, socialist, and conservative.

This book argues that intellectual property rights are duty-bearing privileges. Drawing on the work of, amongst others, Grotius, Locke and Hegel, as well as the law of several countries, the book argues that the use of these privileges should be guided by an instrumentalism based on a principle of humanism.

This book presents the foundations of a liberal individualistic theory of rights, and explains what rights we have and do not have, why we have them, who is and who is not a holder of rights, and the place of rights within the overall structure of morality. The author argues for the moral importance of individual commitments to 'projects', and demonstrates the implications of this for a variety of problems and issues.