LONDON — For centuries, we have been told that without religion we are no more than egotistic animals fighting for our share, our only morality that of a pack of wolves; only religion, it is said, can elevate us to a higher spiritual level. Today, when religion is emerging as the wellspring of murderous violence around the world, assurances that Christian or Muslim or Hindu fundamentalists are only abusing and perverting the noble spiritual messages of their creeds ring increasingly hollow. What about restoring the dignity of atheism, one of Europe's greatest legacies and perhaps our only chance for peace?

More than a century ago, in "The Brothers Karamazov" and other works, Dostoyevsky warned against the dangers of godless moral nihilism, arguing in essence that if God doesn't exist, then everything is permitted. The French philosopher André Glucksmann even applied Dostoyevsky's critique of godless nihilism to 9/11, as the title of his book, "Dostoyevsky in Manhattan," suggests.

This argument couldn't have been more wrong: The lesson of today's terrorism is that if God exists, then everything, including blowing up thousands of innocent bystanders, is permitted - at least to those who claim to act directly on behalf of God, since, clearly, a direct link to God justifies the violation of any merely human constraints and considerations. In short, fundamentalists have become no different than the "godless" Stalinist Communists, to whom everything was permitted, since they perceived themselves as direct instruments of their divinity, the Historical Necessity of Progress Toward Communism.

Fundamentalists do what they perceive as good deeds in order to fulfill God's will and to earn salvation; atheists do them simply because it is the right thing to do. Is this also not our most elementary experience of morality? When I do a good deed, I do so not with an eye toward gaining God's favor; I do it because if I did not, I could not look at myself in the mirror. A moral deed is by definition its own reward. David Hume made this point poignantly when he wrote that the only way to show true respect for God is to act morally while ignoring God's existence.