This book teaches how to make better decisions, not by offering yet another formal system but by providing rich insights to help us choose better: on delegating decisions, indignation and equality, the delights and distresses of consuming goods others consume, and finally, the wonderful chapter on considerateness entirely by Edna herself. -- Nancy Cartwright, Durham University, UK and University of California at San Diego, USA How should we make the hardest choices of our lives? Blending philosophy, law, and political theory, renowned authors Edna Ullmann-Margalit and Cass Sunstein show us how people grapple with this problem by leveraging rules, routines, and the expectations of others. In the process, they highlight how an understanding of social norms transforms our grasp of rational agency. A must read for anyone interested in understanding how real people face real problems in the real world. -- L.A. Paul, Yale University, USA This elegant, incisive exploration of the relationship between decision-making and social norms yields insights into both profound and everyday aspects of life in a democracy and market economy. Drawing on decision theory, psychology, philosophy, and economics, the authors offer an impressive breadth of perspective while maintaining an engaging and humane style. -- Eric Posner, University of Chicago, USA