_ Convention_ was immediately recognized as a major contribution to the subject and its significance has remained undiminished since its first publication in 1969. Lewis analyzes social conventions as regularities in the resolution of recurring coordination problems-situations characterized by interdependent decision processes in which common interests are at stake. Conventions are contrasted with other kinds of regularity, and conventions governing systems of communication are given special attention.

Natural Law and Natural Rights is widely recognised as a seminal contribution to the philosophy of law, and an essential reference point for all students of the subject. This new edition includes a substantial postscript by the author responding to thirty years of comment, criticism, and further work in the field.

Every political theorist will need this book . . . . It is more 'important' than 90% of the work published in philosophy."--Joel Feinberg, University of Arizona.

Practical Reason and Norms focuses on three problems: In what way are rules normative, and how do they differ from ordinary reasons? What makes normative systems systematic? What distinguishes legal systems, and in what consists their normativity? All three questions are answered by taking reasons as the basic normative concept, and showing the distinctive role reasons have in every case, thus paving the way to a unified account of normativity. Rules are a structure of reasons to perform the required act (...) and an exclusionary reason not to follow some competing reasons. Exclusionary reasons are explained, and used to unlock the secrets of orders, promises, and decisions as well as rules. Games are used to exemplify normative systems. Inevitably, the analysis extends to some aspects of normative discourse, which is truth-apt, but with a diminished assertoric force. (shrink)

Legitimate authority -- The claims of law -- Legal positivism and the sources of law -- Legal reasons, sources, and gaps -- The identity of legal systems -- The institutional nature of law -- Kelsen's theory of the basic norm -- Legal validity -- The functions of law -- Law and value in adjudication -- The rule of law and its virtue -- The obligation to obey the law -- Respect for law -- A right to dissent? : civil disobedience (...) -- A right to dissent? : conscientious objection --The purity of the pure theory -- The argument from justice, or how not to reply to legal positivism. (shrink)

First published in 1962, this classic study examines the relationship between authority and justice, life, truth, and order. Simon, himself a passionate proponent of liberty, defends authority as an essential concomitant of liberty.

Edna Ullmann-Margalit provides an original account of the emergence of norms. Her main thesis is that certain types of norms are possible solutions to problems posed by certain types of social interaction situations. She presents illuminating discussions of Prisoners' Dilemma, co-ordination, and inequality situations.

This new edition includes a substantial postscript by the author, in which he responds to thirty years of discussion, criticism and further work in the field to ...

The main theme of this book is the challenge to ethics from philosophical scepticism and from contemporary forms of consequentialism.