For a century, "progressive" writers and filmmakers-multiculturalists like Ward Churchill and Alex Haley, sexual revolutionaries like Kinsey and Margaret Mead, quasi-Marxists like Noam Chomsky and Michael Moore, and radical naturalists like Paul Ehrlich and Rachel Carson-have been using falsehood and fraud as their principal weapons in their assault ontraditional American culture. For years, an unconnected squad of literary detectives, anthropologists,...