What should be done about airplane safety and terrorism, global warming, polluted water, nuclear power, and genetically engineered food? Decision-makers often respond to temporary fears, and the result is a situation of hysteria and neglect–and unnecessary illness and death. Risk and Reason explains the sources of these problems and explores what can be done about them. It shows how individual thinking and social interactions lead us in foolish directions. Offering sound proposals for social reform, it explains how a more sensible system of risk regulation, embodied in the idea of a cost-benefit state, could save many thousands of lives and many billions of dollars too–and protect the environment in the process. Cass R. Sunstein is the Karl N. Llewellyn Distinguished Service Professor at the University of Chicago. Appointed by President Clinton to serve on the Advisory Committee on the Public Interest Obligations of Television Broadcasters. His many books include Republic.com (Princeton, 2001) and Designing Democracy (Oxford, 2001). He has worked in the United States Department of Justice and advised on law reform and constitution-making in many nations.