That America's natural environment has been degraded and despoiled over the past 25 years is beyond dispute. Nor has there been any shortage of reasons why-short-sighted politicians, a society built on over-consumption, and the dramatic weakening of environmental regulations.

In Retaking Rationality, Richard L. Revesz and Michael A. Livermore argue convincingly that one of the least understood-and most important-causes of our failure to protect the environment has been a misguided rejection of reason. The authors show that environmentalists, labor unions, and other progressive...