In "Time to Attack Iran" (January/February 2012), Matthew Kroenig takes a page out of the decade-old playbook used by advocates of the Iraq war. He portrays the threat of a nuclear-armed Iran as both grave and imminent, arguing that the United States has little choice but to attack Iran now before it is too late. Then, after offering the caveat that "attacking Iran is hardly an attractive prospect," he goes on to portray military action as preferable to other available alternatives and concludes that the United States can manage all the associated risks. Preventive war, according to Kroenig, is "the least bad option."
But the lesson of Iraq, the last preventive war launched by the United States, is that Washington should not choose war when there are still other options, and it should not base its decision to attack on best-case analyses of how it hopes the conflict will turn out. A realistic assessment of Iran's nuclear progress and how a conflict would likely unfold leads one to a conclusion that is the opposite of Kroenig's: now is not the time to attack Iran.
Kroenig argues that there is an urgent need to attack Iran's nuclear infrastructure soon, since Tehran could "produce its first nuclear weapon within six months of deciding to do so." Yet that last phrase is crucial. The International Atomic Energy Agency (IAEA) has documented Iranian efforts to achieve the capacity to develop nuclear weapons at some point, but there is no hard evidence
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