
      So the recent talks in Geneva between Iran and the world’s six major  powers produced far more than a long-elusive deal to restrict Iran’s  nuclear program. The new diplomacy also produced real human contact.  U.S. and Iranian diplomats have spent more time together over the past  three months than in the entire three decades since the American Embassy  takeover. They are learning how to talk to each other all over  again—often in the same language. Geneva laid the cornerstone to defuse  34 years of both overt and covert confrontation over a host of other  issues too. The interaction may even help end the Iran jinx that has  tainted or tormented all six American presidents since the 1979  revolution.
              The hostage crisis cost Jimmy Carter a second term. The Reagan  administration was shamed by clumsy secret diplomacy during the  Iran-Contra scandal, which was initiated to free a new set of American  hostages in Beirut but which ended up with the indictment or dismissal  of top White House officials. The first Bush administration’s stab at  Arab-Israeli diplomacy, centered on the 1991 Madrid peace conference,  was matched by deepening ties between Iran and Palestinian  rejectionists.
             The Clinton administration considered military retaliation against  Iran after the 1996 attack on a U.S. Air Force facility in Khobar, Saudi  Arabia killed 19 Americans and injured another 350. A Shiite group with  Iran ties was suspected. The second Bush administration’s “axis of  evil” language sabotaged collaboration in Afghanistan after the  Taliban’s ouster in 2001, while the Iraq and Afghanistan invasions  inadvertently strengthened Tehran’s hand by toppling its two biggest  regional rivals.
             In contrast, Secretary of State John Kerry and Iranian Foreign  Minister Javad Zarif were photographed laughing together across the  negotiating table in Geneva. In the wee hours of November 24, they shook  hands—more than just politely—after signing an agreement opening the  way for six months of even more intensive contact. No one noted that  Kerry wore a (bright red) tie, but Zarif didn’t, in deference to the  revolutionary dress code banning ties as symbols of Western  influence—the kind of colorful anecdote once trotted out to underscore  deep differences.
             Debate will rage from Capitol Hill to the Persian Gulf over specifics  of the interim deal. Many both at home and abroad are dissatisfied.  Some may try to scuttle it. The volume will almost certainly go up as  diplomacy intensifies.
             But the reality is that Iran’s nuclear program is now too advanced to  either bomb or sanction totally out of business. A deal should have  happened a decade ago when Iran had less than 200 centrifuges to enrich  uranium, the fuel for both peaceful nuclear energy and the world’s  deadliest weapon. Now it has near 19,000. Both sides were too stubborn  back then.
 The conventional wisdom claims Iran came to the negotiating table  under pressure from unparalleled economic sanctions. True. But the  unacknowledged truth is that the outside world also went into diplomacy  under pressure from Iran’s growing capabilities. Otherwise, the world’s  six major powers could have just kept squeezing the Islamic Republic.  Tehran also now has nuclear knowledge that can’t be bombed out of  existence.
             So, ultimately, even a military strike would require diplomacy to  prevent Tehran from rebuilding. The core issue is as much Iran’s  long-term calculations as its capabilities.
 Diplomacy is not only about preventing war. It’s also about healing.  President Nixon’s diplomacy ended 30 years of deadly tensions with  China, which included Beijing’s arming, aiding and sending troops to  North Vietnam. President Clinton resumed relations with a reunited  Vietnam 20 years after the United States lost more than 58,000 lives in a  war to keep the Communists from consuming the south.
             The sprawling American Embassy compound in Tehran is not likely to  reopen anytime soon. But in pushing for a nuclear deal, Geneva started  the long and painful healing that could eventually alter Tehran’s  calculations—not only about its nuclear program.