New at The Atlantic: The Iran War Dial

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War or peace in the Middle East amounts to a coin toss. The probability that the United States or Israel will strike Iran in the next year is 48 percent according to the Iran War Dial, our new project gauging the chances of conflict.*

How does the Iran War Dial work?


We've assembled a high-profile panel of experts from the policy world, academia, and journalism to periodically predict the odds of conflict. They include: Daniel Byman, Shahram Chubin, Golnaz Esfandiari, Azar Gat, Jeffrey Goldberg, Amos Harel, Ephraim Kam, Dalia Dassa Kaye, Matthew Kroenig, John Limbert, Valerie Lincy, James Lindsay, Marc Lynch, Gary Milhollin, Trita Parsi, Paul Pillar, Barry Rubin, Karim Sadjadpour, Kenneth Timmerman, Shibley Telhami, Stephen Walt, and Robin Wright.

It's a diverse group ranging from a former Deputy Assistant Secretary of State for Iran, to a Senior Vice President at the Council on Foreign Relations; from a Deputy Head of the Institute for National Security Studies in Tel Aviv, to a military correspondent at Haaretz.

Each panelist makes an individual estimate about the percentage chance of war and we report the average score.

The Iran War Dial is not designed to be pro-war or anti-war. Rather, the purpose is to gauge the chances of conflict with Iran in the hope of producing a more informed debate in the U.S. and abroad. If people hold very inaccurate views of the odds of war, it could be dangerous.

We're humble about the accuracy of this prediction, which is really a collective "gut-check." But it may be closer to the truth than the alternative forecasts available.

For more details on project, and the panel, read these FAQs.

Before turning to the panel's estimate, what is the latest on the Iranian crisis?

In February 2012, the UN's nuclear watchdog, the International Atomic Energy Agency, announced that its mission in Iran had failed. Tehran was unwilling to offer full access to its nuclear sites and allay concerns over "possible military dimensions" to its nuclear program. Iran's supreme leader, Ayatollah Ali Khamenei, said that IAEA fears were "baseless," and Tehran offered to resume negotiations.

Israel has recently stepped up its rhetoric, describing an Iranian bomb as an existential threat and suggesting that there is a limited window of opportunity to significantly damage the Iranian nuclear program. "Whoever says 'later'," remarked Defense Minister Ehud Barak: "may find that later is too late." Israel also signaled that it would not warn Washington before launching a unilateral strike on Iran.

According to Israeli President Shimon Peres, Israel is not rushing into war, but "if another war is forced upon us, we will fight it and we will win it." U.S. defense analysts have raised doubts, however, about Israel's capacity to wage a sustained bombing campaign over the "days and weeks" necessary to destroy key Iranian sites.

In the last week, President Barack Obama delivered a carefully calibrated message on Iran. He told the Atlantic that, "as president of the United States, I don't bluff," adding that, "when the United States says it is unacceptable for Iran to have a nuclear weapon, we mean what we say." In a speech to the American Israel Public Affairs Committee on Sunday, the president affirmed that the United States had "Israel's back," and rejected a policy of containing a nuclear Iran. At the same time, Obama announced his "deeply held preference" for peace over war, and urged Israel to allow time for economic sanctions against Iran to bite.

Prominent Republicans have adopted a more hawkish stance on Iran, criticizing the president for a weak policy, and pushing Obama to draw clear "red lines" that, if crossed, would provoke a U.S. strike.

Given this context, the panel estimated that the odds of war in the next twelve months were 48 percent. Out of interest, the median estimate was also 48 percent.

This prediction is consistent with the betting market Intrade.com, which estimates a 40 percent chance of a U.S./Israeli strike by December 2012. When two different methods of prediction produce a similar result, it increases our confidence that the estimate is fairly accurate.

Peace is still more likely than war, but only just. And when we next update the Iran War Dial, an increase of just three percentage points would mean the odds will favor the hawks.


* When we launched this feature, we called it the "Iran War Clock." See here for an explanation of the change.
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Dominic Tierney is a correspondent for The Atlantic and an associate professor of political science at Swarthmore College. He is the author of How We Fight: Crusades, Quagmires, and the American Way of War. More

Dominic Tierney is associate professor of political science at Swarthmore College, and a senior fellow at the Foreign Policy Research Institute. He completed his PhD in international politics at Oxford University and has held fellowships at the Mershon Center at Ohio State University, the Olin Institute at Harvard University, and the John F. Kennedy School of Government at Harvard.

He is the author of Failing to Win: Perceptions of Victory and Defeat in International Politics (Harvard University Press, 2006), with Dominic Johnson, which won the International Studies Association award for the best book published in 2006, and FDR and the Spanish Civil War: Neutrality and Commitment in the Struggle that Divided America (Duke University Press, 2007).

His latest book is How We Fight: Crusades, Quagmires, and the American Way of War (Little, Brown 2010), which Ambassador James Dobbins, former Assistant Secretary of State for Europe, described as "A great theme, beautifully written and compellingly organized, it's a fitting update to Russell Weigley's classic [The American Way of War] and an important contribution to a national debate over the war in Afghanistan which is only gathering steam." (More on Facebook.)

Dominic's work has also appeared in The New York Times, The Los Angeles Times, TIME.com, and on NPR.
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