This week has been filled with Iraq War recriminations and re-evaluations. While official Washington was strangely silent about the 10th anniversary of the start of the conflict, journalists and intellectuals have been (predictably) more vocal. Prominent neocons have reaffirmed, with minor caveats, their support for the war. Some (erstwhile) liberal hawks have issued full-throated mea culpas. Other liberals, meanwhile, have tried to have it both ways, denouncing the war they once supported while praising its outcome. And of course, lots of people who opposed the war from the beginning, on the right and left, have declared vindication.

My own position on the war fits into none of these categories. Ten years ago, I was working as an editor at First Things, a monthly magazine that's aptly been described as the New York Review of Books of the religious right. (And no, that's not oxymoronic.) The magazine strongly supported George W. Bush's original conception of the War on Terror, and so did I. In his speech to Congress and the nation on September 20, 2001, Bush stated that the United States would seek to decimate al Qaeda as well as every other terrorist groups of global reach. To this day I remain committed to that goal and willing to support aggressive military action (including the use of drone strikes) to achieve it. But thanks in large part to the Iraq War, I no longer consider myself a Republican or a man of the right.

The reason I continue (like President Obama) to support the original vision of the War on Terror is that it was and is based on a correct judgment of the fundamental difference between (stateless) terrorists and traditional (state-based) military opponents. Even the most bloodthirsty tyrant will invariably temper his actions in war out of a concern for how his adversary will respond, and he will likewise act out of a concern for maintaining and maximizing his own power. Political leaders can thus be deterred by actions (and threats of action) by other states. Members of al-Qaeda-like groups, by contrast, seek in all cases to inflict the maximum possible number of indiscriminate deaths on their enemies and demonstrate no concern about the lives of their members. They are therefore undeterrable, which means that the only way to combat them is to destroy them.

Unfortunately, the right began to disregard the crucial distinction between terrorists and states right around the time of the January 2002 State of the Union speech, when President Bush broadened the scope of the War on Terror to include an "axis of evil" consisting of Iraq, Iran, and North Korea. After that, the mood among conservatives began to grow fierce. Some columnists denied the effectiveness of deterrence against states and advocated unilateral preventive war to overthrow hostile regimes instead. Others openly promoted American imperialism. Still others explicitly proposed that the United States act to topple the governments of a series of sovereign nations in the Muslim Middle East, including Iraq, Iran, Syria, Lebanon, Egypt, and Saudi Arabia.

And these were the intellectually respectable suggestions, published in mainstream newspapers and long-established journals of opinion. Farther down the media hierarchy, on cable news, websites, and blogs, conservatives of all stripes closed ranks, unleashing a verbal barrage on any and all who dissented from a united front in favor of unapologetic American military muscle. The participants in this endless pep rally were insistent on open-ended war, overtly hostile to dissent, and thoroughly unforgiving of the slightest criticism of the United States abroad. Self-congratulation and self-righteousness ruled the day.

Alarmed by the transformation on the right and in the magazine's offices, I wrote a lengthy email in October 2002 to a number of my fellow conservatives, explaining why I thought it would be a serious mistake to turn Iraq into the next front in the War on Terror. My reasons had nothing to do with the administration's claims about Saddam Hussein's arsenal of weapons of mass destruction; like all commentators on the right, most independent observers, and large numbers of intelligence agencies around the world, I assumed that Hussein either possessed or was actively working to acquire such weapons. Neither was I overly concerned about worldwide public opinion. I objected to what I judged to be three erroneous assumptions on the part of conservatives inside and outside the Bush administration.

First, I believed the administration was wrong to claim that Hussein could not be deterred. In fact, he already had been. In the first Gulf War, Hussein refrained from using chemical weapons against our troops on the battlefield and against Israel in his inept Scud-missile attacks on Tel Aviv. Why? Because before the start of the war James Baker and Dick Cheney sent messages through diplomatic channels to the Iraqi dictator, informing him that we would respond to any use of WMD with a nuclear strike. Israel's Defense Minister Moshe Arens made similar threats. And they worked. Yes, Hussein was a brutal dictator, but he could be deterred.

Second, it was foolish to believe (as Paul Wolfowitz and others on the right apparently did) that overthrowing Hussein would lead to the creation of a liberal democracy in Iraq that would, in turn, inspire democratic reforms throughout the Middle East. This view displayed an ignorance of (or, more likely, indifference toward) the competing ethnic and religious forces that prevailed in different regions of Iraq as well as a typically American optimism about the spontaneous capacity of all human beings in all times, places, and cultures for self-government. Rather than inspiring the formation of liberal democracies throughout the region, an Iraqi invasion could very well empower the very forces of radical Islam that the War on Terror rightly aimed to destroy.

Third, the right was making a serious mistake in assuming that doing nothing about Iraq was inevitably more dangerous than doing something. The U.S. got caught with its pants down on 9/11, and the fear of it happening again was leading the Bush administration to formulate policies based entirely on negative evidence. The super-hawks advocating preventive war seemed more persuasive than those urging a more cautious approach because the former placed an ominous black box at the core of their deliberations — a black box containing all the horrors of our worst post-September 11 nightmares. But reasoning on that basis could be used to justify absolutely anything, and so, I concluded, it was a reckless guide to action.

None of my friends and colleagues on the right responded to the arguments in my email, and few even acknowledged receiving it. By breaking from the right-wing consensus in favor of unconditional bellicosity, I had gone rogue. Over the next year and a half, as the victorious invasion became a bloody mess of an occupation and these same friends and colleagues refused to admit — to me or to themselves, let alone to the public — that they had made a massive mistake, I drifted away from the right and never looked back. (There were other factors, too.)

My dissent had nothing to do with principles; it was a matter of prudence or judgment. On foreign policy, Republicans had become the stupid party. And so it remains 10 years later.