HICAGO -- During the interval between the terrorist attacks and the United States response, a reporter called to ask me if the events of Sept. 11 meant the end of postmodernist relativism. It seemed bizarre that events so serious would be linked causally with a rarefied form of academic talk. But in the days that followed, a growing number of commentators played serious variations on the same theme: that the ideas foisted upon us by postmodern intellectuals have weakened the country's resolve. The problem, according to the critics, is that since postmodernists deny the possibility of describing matters of fact objectively, they leave us with no firm basis for either condemning the terrorist attacks or fighting back.

Not so. Postmodernism maintains only that there can be no independent standard for determining which of many rival interpretations of an event is the true one. The only thing postmodern thought argues against is the hope of justifying our response to the attacks in universal terms that would be persuasive to everyone, including our enemies. Invoking the abstract notions of justice and truth to support our cause wouldn't be effective anyway because our adversaries lay claim to the same language. (No one declares himself to be an apostle of injustice.)

Instead, we can and should invoke the particular lived values that unite us and inform the institutions we cherish and wish to defend.

At times like these, the nation rightly falls back on the record of aspiration and accomplishment that makes up our collective understanding of what we live for. That understanding is sufficient, and far from undermining its sufficiency, postmodern thought tells us that we have grounds enough for action and justified condemnation in the democratic ideals we embrace, without grasping for the empty rhetoric of universal absolutes to which all subscribe but which all define differently.

But of course it's not really postmodernism that people are bothered by. It's the idea that our adversaries have emerged not from some primordial darkness, but from a history that has equipped them with reasons and motives and even with a perverted version of some virtues. Bill Maher, Dinesh D'Souza and Susan Sontag have gotten into trouble by pointing out that "cowardly" is not the word to describe men who sacrifice themselves for a cause they believe in.

Ms. Sontag grants them courage, which she is careful to say is a "morally neutral" term, a quality someone can display in the performance of a bad act. (Milton's Satan is the best literary example.) You don't condone that act because you describe it accurately. In fact, you put yourself in a better position to respond to it by taking its true measure. Making the enemy smaller than he is blinds us to the danger he presents and gives him the advantage that comes along with having been underestimated.

That is why what Edward Said has called "false universals" should be rejected: they stand in the way of useful thinking. How many times have we heard these new mantras: "We have seen the face of evil"; "these are irrational madmen"; "we are at war against international terrorism." Each is at once inaccurate and unhelpful. We have not seen the face of evil; we have seen the face of an enemy who comes at us with a full roster of grievances, goals and strategies. If we reduce that enemy to "evil," we conjure up a shape- shifting demon, a wild-card moral anarchist beyond our comprehension and therefore beyond the reach of any counterstrategies.

The same reduction occurs when we imagine the enemy as "irrational." Irrational actors are by definition without rhyme or reason, and there's no point in reasoning about them on the way to fighting them. The better course is to think of these men as bearers of a rationality we reject because its goal is our destruction. If we take the trouble to understand that rationality, we might have a better chance of figuring out what its adherents will do next and preventing it.

And "international terrorism" does not adequately describe what we are up against. Terrorism is the name of a style of warfare in service of a cause. It is the cause, and the passions informing it, that confront us. Focusing on something called international terrorism ?detached from any specific purposeful agenda ?only confuses matters. This should have been evident when President Vladimir Putin of Russia insisted that any war against international terrorism must have as one of its objectives victory against the rebels in Chechnya.

When Reuters decided to be careful about using the word "terrorism" because, according to its news director, one man's terrorist is another man's freedom fighter, Martin Kaplan, associate dean of the Annenberg School for Communication at the University of Southern California, castigated what he saw as one more instance of cultural relativism. But Reuters is simply recognizing how unhelpful the word is, because it prevents us from making distinctions that would allow us to get a better picture of where we are and what we might do. If you think of yourself as the target of terrorism with a capital T, your opponent is everywhere and nowhere. But if you think of yourself as the target of a terrorist who comes from somewhere, even if he operates internationally, you can at least try to anticipate his future assaults.
?BR> Is this the end of relativism? If by relativism one means a cast of mind that renders you unable to prefer your own convictions to those of your adversary, then relativism could hardly end because it never began. Our convictions are by definition preferred; that's what makes them our convictions. Relativizing them is neither an option nor a danger.

But if by relativism one means the practice of putting yourself in your adversary's shoes, not in order to wear them as your own but in order to have some understanding (far short of approval) of why someone else might want to wear them, then relativism will not and should not end, because it is simply another name for serious thought.