There are certain predictable symptoms to watch when a widespread amorality begins to infect a postmodern society: cultural relativism, atheism, socialism, utopian pacifism. Another sign, of course, is fashionable anti-Semitism among the educated, or the idea that some imaginary cabal, or some stealthy agenda — certainly not our own weakness — is conspiring to threaten our good life. Well apart from the spooky placards (stars of David juxtaposed with swastikas, posters calling for the West Bank to be expanded to "the sea") that we are accustomed to seeing at the marches of the supposedly ethical antiwar movement, we have also...