Few have weighed in on the nation's contentious debate over evolution as effectively as Kenneth R. Miller. In Only a Theory, Miller - the highly regarded scientist who offered expert testimony at the 2005 trial over the teaching of evolution in Dover, Pennsylvania - eloquently shows how "Intelligent Design" collapses at the very moment one begins to take it seriously. Miller shows that the attack on evolution is a broader assault on the skepticism and reason that have fueled America's remarkable scientific advances, and offers an encouraging prescription for how we can save the nation's "scientific soul" to which we owe so much.