That is why liberals are far more likely to be impressed when a Nobel Prize winner in, let us say, physics signs an ad against war or against capital punishment. The liberal is bowled over by the title "Nobel laureate." The conservative is more likely to wonder why a Nobel laureate in physics has anything more meaningful to say about war than, let us say, a taxi driver.

-- People who don't confront the greatest evils will confront far lesser ones. Most humans know the world is morally disordered -- and socially conscious humans therefore try to fight what they deem to be most responsible for that disorder. The Right tends to fight human evil such as communism and Islamic totalitarianism. The Left avoids confronting such evils and concentrates its attention instead on socioeconomic inequality, environmental problems and capitalism. Global warming meets all three of these criteria of evil. By burning fossil fuels, rich countries pollute more, the environment is being despoiled and big business increases its profits.

-- The Left is far more likely to revere, even worship, nature. A threat to the environment is regarded by many on the Left as a threat to what is most sacred to them, and therefore deemed to be the greatest threat humanity faces. The cover of Vanity Fair's recent "Special Green Issue" declared: "A Graver Threat Than Terrorism:

Global Warming." Conservatives, more concerned with human evil, hold the very opposite view: Islamic terror is a far graver threat than global warming.

-- Leftists tend to fear dying more. That is one reason they are more exercised about our waging war against evil than about the evils committed by those we fight. The number of Iraqis and others Saddam Hussein murdered troubles the Left considerably less than even the remote possibility than they may one day die of global warming (or secondhand smoke).

One day, our grandchildren may ask us what we did when Islamic fascism threatened the free world. Some of us will say we were preoccupied with fighting that threat wherever possible; others will be able to say they fought carbon dioxide emissions. One of us will look bad.