By what criteria should public policy be evaluated? Fairness and justice? Or the welfare of individuals? Debate over this fundamental question has spanned the ages.

Fairness versus Welfare poses a bold challenge to contemporary moral philosophy by showing that most moral principles conflict more sharply with welfare than is generally recognized. In particular, the authors demonstrate that all principles that are not based exclusively on welfare will sometimes favor policies under which literally everyone would be worse off. The book draws on the work of moral philosophers, economists, evolutionary and cognitive psychologists, and legal academics to scrutinize a number of particular subjects that have engaged legal scholars and moral philosophers.

How can the deeply problematic nature of all nonwelfarist principles be reconciled with our moral instincts and intuitions that support them? The authors offer a fascinating explanation of the origins of our moral instincts and intuitions, developing ideas originally advanced by Hume and Sidgwick and more recently explored by psychologists and evolutionary theorists. Their analysis indicates that most moral principles that seem appealing, upon examination, have a functional explanation, one that does not justify their being accorded independent weight in the assessment of public policy.

Fairness versus Welfare has profound implications for the theory and practice of policy analysis and has already generated considerable debate in academia.

Theories of social justice are necessarily abstract, reaching beyond the particular and the immediate to the general and the timeless. Yet such theories, addressing the world and its problems, must respond to the real and changing dilemmas of the day. A brilliant work of practical philosophy, Frontiers of Justice is dedicated to this proposition. Taking up three urgent problems of social justice neglected by current theories and thus harder to tackle in practical terms and everyday life, Martha Nussbaum seeks a theory of social justice that can guide us to a richer, more responsive approach to social cooperation.

The idea of the social contract--especially as developed in the work of John Rawls--is one of the most powerful approaches to social justice in the Western tradition. But as Nussbaum demonstrates, even Rawls's theory, suggesting a contract for mutual advantage among approximate equals, cannot address questions of social justice posed by unequal parties. How, for instance, can we extend the equal rights of citizenship--education, health care, political rights and liberties--to those with physical and mental disabilities? How can we extend justice and dignified life conditions to all citizens of the world? And how, finally, can we bring our treatment of nonhuman animals into our notions of social justice? Exploring the limitations of the social contract in these three areas, Nussbaum devises an alternative theory based on the idea of "capabilities." She helps us to think more clearly about the purposes of political cooperation and the nature of political principles--and to look to a future of greater justice for all.