Lyndon Johnson heralded a "new federalism," as did Ronald Reagan. It was left to the public to puzzle out what such a proclamation, coming from both ends of the political spectrum, could possibly mean. Of one thing we can be certain: theories of federalism, in whatever form they take, are still shaping our nation. The origin of these theories-what they meant to history and how they apply today becomes clear in this book by one of our most distinguished...