Matthew Kroenig’s recent article in this magazine argued that a military strike against Iran would be “the least bad option” for stopping its nuclear program. But the war Kroenig calls for would be far messier than he predicts, and Washington still has better options available.
COLIN H. KAHL is an Associate Professor in the Security Studies Program at Georgetown University’s Edmund A. Walsh School of Foreign Service and a Senior Fellow at the Center for a New American Security. In 2009-11, he was U.S. Deputy Assistant Secretary of Defense for the Middle East.
Opponents of military action against Iran assume a U.S. strike would be far more dangerous than simply letting Tehran build a bomb. Not so, argues this former Pentagon defense planner. With a carefully designed attack, Washington could mitigate the costs and spare the region and the world from an unacceptable threat.
To suggest a nuclear Iran would result in a cascade of proliferation across the Middle East neglects the United States' power to prevent clients from building their own bombs.
Bombing Iran's nuclear program would only be a temporary fix. Instead, the United States should plan a larger military operation that also aims to destabilize the regime and, in turn, resolves the Iranian nuclear crisis once and for all.
U.S. and Israeli officials have declared that a nuclear-armed Iran is a uniquely terrifying prospect, even an existential threat. In fact, by creating a more durable balance of military power in the Middle East, a nuclear Iran would yield more stability, not less.

Obama speaks about the U.N. Security Council's sanctions on Iran (Kevin Lamarque / Courtesy Reuters)
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.
BAD TIMING
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 that Supreme Leader Ayatollah Ali Khamenei has yet made the final decision to develop them...
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