When William F. Buckley Jr. launched America's conservative movement half a century ago, the requisite foe came readily to hand. In God & Man at Yale, Buckley identified the university he had just left -- and, by implication, the country's entire higher-education establishment -- as the driving force behind "agnosticism and collectivism" in American life. The specter of radical leftists in control of the nation's campuses would invigorate Republican platforms and speakers for a generation.