Multiculturalism. It has been the subject of cover stories in Time and Newsweek, as well as numerous articles in newspapers and magazines around America. It has sparked heated jeremiads by George Will, Dinesh D'Sousa, and Roger Kimball. It moved William F. Buckley to rail against Stanley Fish and Catherine Stimpson on "Firing Line." It is arguably the most hotly debated topic in America today--and justly so. For whether one speaks of tensions between...