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Traditional conservatism has a piece missing — a piece that is shaped like a conscience. The article describing Gerson’s book has strange echoes of a different account of Gerson’s gloryhounding when he was a speechwriter: Time and again, Gerson depicts a lonely struggle to advance measures that would benefit AIDS patients, impoverished children or prisoners reentering society. Gerson is always engaged in a lonely struggle, undoubtedly waged from his base camp from deep inside some social democratic beanery, at least when he is not single-handedly writing Inaugural speeches at Starbucks. Update: Gerson appeared on The Daily Show this week. He seems to have been on the verge of tears half the time. However, something like the reverse is also true: Just because the initial invasion was almost certainly a mistake doesn’t necessarily mean that the continued presence of U.S. troops is a mistake as well. And I detect some goalpost-shifting here among the partisans of immediate withdrawal. And: But given that only six weeks ago he [Yglesias] was throwing out “4 or 5 more years” as a timeline for when Iraq might start to settle down, I think it’s also “at least plausible” that when we look back on the last year of American military operations in Iraq, we’ll judge them to have played a major role in putting the worst behind us earlier than most people anticipated. I suppose I must chime in with my usual dose of pessimism. The “continued presence of U.S. troops” would only not be a mistake if there were reason to think that the changes that have yielded some marginal, temporary improvement in security were going to continue and serve as the foundation for some enduring security. As Prof. Bacevich has said: The general has now made his call, and President Bush has endorsed it: the surge having succeeded (so at least we are assured), it will now be curtailed. The war will continue, albeit on a marginally smaller scale. This goes to the heart of Prof. Bacevich’s criticism of Gen. Petraeus, which is that the plan that seems to be producing some results is being brought to a close because it was not politically viable under the current circumstances to keep it going, much less expand it. Bacevich again: Petraeus has chosen a middle course, carefully crafted to cause the least amount of consternation among various Washington constituencies he is eager to accommodate. This is the politics of give and take, of horse trading, of putting lipstick on a pig. Ultimately, it is the politics of avoidance. And again: Yet Petraeus has chosen to do just the opposite. Based on two or three months of (ostensibly) positive indicators, he has advised the president to ease the pressure, withdrawing the increment of troops that had (purportedly) enabled the coalition to seize the initiative in the first place. This defies logic. It’s as if two weeks into the Wilderness Campaign, Grant had counseled Lincoln to reduce the size of the Army of the Potomac. Or