This provocative, lucidly written reconstruction of utilitarianism focuses on the practical constraints involved in ethical choice: information may be inadequate, and understanding of causes and effects may be limited. Good decision making may be especially constrained if other people are closely involved in determining an outcome. Hardin demonstrates that many of these structural issues can and should be distinguished from the thornier problems of utilitarian value theory, and he is able to show what kinds of moral conclusions we can reach within the limits of reason.