The conservative idea is not that government has no role. You might have argued that in the thirties when conservatives opposed the New Deal.

When under attack, no country is obligated to collect permission slips from allies to strike back.

Preemption is a kind of pre-deterrence that stops the threat at an earlier, safer stage.

In the Middle Ages people took potions for their ailments. In the 19th century they took snake oil. Citizens of today's shiny, technological age are too modern for that. They take antioxidants and extract of cactus instead.

History has blessed us with all the freedom and advantages of multiculturalism. But it has also blessed us, because of the accident of our origins, with the linguistic unity that brings a critically needed cohesion to a nation as diverse, multiracial and multiethnic as America. Why gratuitously throw away that priceless asset? How mindless to call the desire to retain it 'racist.

When a party is in opposition, it opposes. That's its job. But when it comes to power, it must govern. Easy rhetoric is over, the press of reality becomes irresistible. By necessity, it adopts some of the policies it had once denounced. And a new national consensus is born.

Where there is a confluence of interests among nations, as, for example the swine flu or polio, you can get well functioning international institutions like the World Health Organization. And you can act. Climate change is different, because the science remains hypothetical and the potential costs staggering.