One way to educate free riders—or call their bluff, as the case may be—is to refuse to drive the bus. Seek U.N. authorization for attack in the event that Iraq continues to rebuff inspectors; if you don't get it, then don't attack; let Saddam Hussein give anthrax to terrorists and kill a few thousand people, possibly Europeans. Maybe that will convince the Europeans that this ain't bean bag.

A few thousand lives may seem a high price to pay for pedagogy, but remember Prescription 1: Take your bitter medicine early. Given the length of the war on terrorism, and the importance of fair burden sharing, we have to enlighten the Europeans sooner or later. Better to do it when anthrax is the form of enlightenment, not nukes and not some explosively contagious germ. Nobody seems to think Iraq has nukes yet. And the scariest contagious germ he might have—small pox—is a threat that can be handled via a vaccination program. And chemical weapons, though called weapons of mass destruction, really aren't. Like anthrax (a biological weapon but a non-contagious one), they could at most kill a few thousand people unless applied in an implausibly elaborate and well-orchestrated manner.