U.S. Secretary of State John Kerry steps aboard his aircraft en route to Geneva, November 8, 2013.
Jason Reed / Reuters

The deal with Iran falls far short of what the United States and its European allies would like. They wanted Tehran to dismantle its nuclear program, agree to unimpeded inspections, and forgo ballistic missiles and support of Hezbollah and Hamas. But these are terms that can only be imposed on a country that has been militarily defeated. So the two pertinent questions are whether the P5+1 got the best deal possible and, more importantly, whether it is better than the likely results of walking away from the table.

It is extremely unlikely that the P5+1 got the best deal possible (

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