"Well-being," "welfare," "utility," and "quality of life" all closely related concepts, are at the center of morality, politics, law, and economics. Griffin's book, while primarily a volume of moral philosophy, is relevant to all of these subjects. Griffin offers answers to three central questions about well-being: the best way to understand it, whether or not it can be measured, and where it should fit in moral and political thought. With its breadth of investigation and depth of insight, this work holds significance for philosophers as well as for those interested in political and economic theory and jurisprudence.