You can have the most advanced and efflorescent of cultures. Get your politics wrong, however, and everything stands to be swept away. This is not ancient history. This is Germany 1933... Politics is the moat, the walls, beyond which lie the barbarians. Fail to keep them at bay, and everything burns.

I don't know about you, but I lie awake nights worrying about Canadian uranium. I know these people. I grew up there. You have no idea what they're capable of doing. If Sidney Crosby hadn't scored that goal to win the Olympic gold medal, there's no telling what might have ensued.

Americans are not intrinsically imperial, but we ended up dominant by default: Europe disappeared after the Second World War, the Soviet Union disappeared in 1991, so here we are.

So far as Im concerned, Ronald Reagan was the best president. Nixon was the worst. Some of his policies were okay, but he disgraced the office.

If we insist that public life be reserved for those whose personal history is pristine, we are not going to get paragons of virtue running our affairs. We will get the very rich, who contract out the messy things in life the very dull, who have nothing to hide and nothing to show and the very devious, expert at covering their tracks and ambitious enough to risk their discovery.

So a Holocaust-denying, virulently anti-Semitic, aspiring genocidist, on the verge of acquiring weapons of the apocalypse, believes that the end is not only near but nearer than the next American presidential election. (Pity the Democrats. They cannot catch a break.) This kind of man would have, to put it gently, less inhibition about starting Armageddon than a normal person.

If [Bush's] successors don't screw it up, within 10 years NASA will have us back to where we belong -- on other worlds.