Pundits like to imagine that they take political positions only after a careful consideration of the merits — listening to arguments, studying position papers, weighing the pros and cons, and coming to a decision.

But politics is not necessarily so rational, and never was irrationality more plainly on display than in the months leading up to the Iraq War. Ten years later, it is worth exploring why so many opinion-makers – including those who were otherwise critical of the Bush administration — passionately advocated war.

For at least some leading pundits, their position seems to have been shaped less by “reason” or “ideas” than something more primal and even tribal, reflecting their fantasies about who they imagined themselves to be. What follows is a taxonomy of certain pundits on the center and the left who, to their eternal shame, beat the drums of war — hard.

First let’s consider the contrarians. Young Matthew Yglesias, who was in college at the time and thus deserves to be excused, wrote a refreshingly honest piece that noted the seductions of contrarianism: “Being for the war was a way to simultaneously be a free-thinking dissident in the context of a college campus and also be on the side of the country’s power elite.” It was easy to feel the glow of being an utterly unique snowflake, and yet at the same time to join the establishment. How special!

What Yglesias calls the“fake-dissident posture” held a powerful allure for war supporter Dan Savage as well. Reading between the lines of his stridently pro-war 2003 column, it’s clear that the anti-war types worked his last nerve. Everything about them is uncool — their posters are “sad-looking” and their slogans are cheesy. True, the left can be deeply irritating. Protests are great, but why can’t the organizers come up with better music? Yet that’s a stunningly shallow reason to support a brutal war that left over100,000 people dead.

Next up are those heroic journalists – sometimes dubbed the “Keyboard Commandos” — who wanted to re-fight World War II in Iraq. This crew saw Islam as a noxious, world-conquering ideology akin to Nazism: Islamofascism, as the late Christopher Hitchens once coined it. He and Andrew Sullivan flattered themselves as intellectual heirs of George Orwell, saving the world from both fascism and left-wing appeasers. Sullivan’s smearing of war opponents as a “fifth column” made that abundantly clear.

Paul Berman was another journalist who tirelessly refought the good war from his armchair. As he explained in a roundtable, Iraq was important because it provided an opportunity for intellectuals to “speak up.” How lovely for them! Admittedly, says Berman, the Iraq and Afghanistan wars were “counterproductive in some respects,” because “for a while, they appeared to discredit the notion of liberal democracy, which was dreadful. This, apart from the deaths and suffering.” [emphasis added].

On the tape, writer David Rieff is aghast: “All this to raise the issue of liberal democracy? My God, man!” My God, indeed.

Let’s not neglect the pundits of the so-called “decent left.” Obsessed with preserving the martial virtue of the Democratic Party, these types zealously advocated a militaristic version of liberalism.  Peter Beinart, then editor of The New Republic, figured prominently in this group. To Beinart, opponents of the Iraq War were guilty of  “abject pacifism”, and he all but advocatedpurging them from the Democratic Party, Cold War-style. They might be liberals, but wanted the world to know they were respectable thinkers– not filthy hippies.

The next group, the ones I call the crusading superheroes, advocated intervening in Iraq on humanitarian grounds. They envisioned themselves sweeping into the country like red, white, and blue-clad Captain Americas, ridding the country of evil supervillain Saddam Hussein and spreading democracy and prosperity to a grateful nation. George Packer, who as late as 2005 was claiming the war was still “winnable,” was among the most prominent of these. The compulsion of these types to cast themselves as saviors made them blind to what anyone with eyes could see: Iraq was never a promising case for intervention, as the real experts on the region were desperately trying to tell people. But facts, schmacts — what these guys were jonesing for was an occasion to assert their moral purity.

Finally, there’s the most powerful, if most deeply buried justification of all: Iraq provided an opportunity for dweebish, pasty, desk-bound dudes to indulge in macho daydreams. Throughout history, men have asserted masculine dominance through imperial adventures. While few liberal female pundits were pro-war, many centrist and liberal men were unable to resist the war’s siren call.

The most infamous example of  such macho knucklehead punditry is Thomas Friedman’s 2003 appearance on The Charlie Rose Show. The war, he said then, was “unquestionably worth doing” so we could tell the Iraqis to “suck on this.” Commentary so inane and puerile would sound outrageous coming out of the mouth of Friedman’s fictional look-alike Ron Burgundy; that an actual, Pulitzer Prize-winning, New York Times columnist said it simply boggles the mind.

By 2011, writing as the last American troops pulled out of Iraq, Friedman’s macho swagger had completely vanished. Was the war a wise choice? “My answer is twofold: ‘No’ and ‘Maybe, sort of, we’ll see.’ ” Weasel words don’t get any more weaselly. This week he said merely that America “paid too much” for the war.

Writing this week in The New Yorker, Packer admits “the war was a disaster for Iraq and the U.S. alike. It was conceived in deceit and born in hubris.” Note the passive voice — he takes no personal responsibility for helping to foment the media stampede into war.

For what it’s worth, Beinart eventually saw the war as a tragic mistake. But his repentance came far too late. But Berman clearly has learned nothing and has no regrets. He wrote in The New Republic this week that “the isolationist alternative” to the war was “fantastical nonsense.”

Sullivan eventually denounced the war as tragically wrong – but in the early days, when it actually mattered, he was among its most obnoxious cheerleaders. His buddy Hitchens died in 2011, without ever having second thoughts about Iraq.

As for Dan Savage, his position grew more ambivalent within six months after that highly belligerent column —  but he doesn’t seem to have written a word about Iraq since then.

The inability of these pundits to think straight may simply be a symptom of narcissism poisoning. For them, invasion and war were all about presenting their preferred face to the world — and to themselves. Henry James once wrote that a writer should be “one of the people on whom nothing is lost.” For these pundits, everything was lost — everything, that is, but their own overgrown egos.