“Iran has at least as much at stake in a stable Iraq, and a stable Afghanistan, as we do — and as an immediate neighbor has a far greater ability to influence them, for good or ill,” said Nader Mousavizadeh, the Iranian-American co-founder of Macro Advisory Partners and a former top aide to U.N. Secretary General Kofi Annan.

There is a struggle in Tehran today between those who want Iran to behave as a nation, looking out for its interests, and those who want it to continue behaving as a permanent revolution in a permanent struggle with America and its allies. What’s at stake in the Geneva nuclear negotiations — in part — “is which Iranian foreign policy prevails,” argued Mousavizadeh. A mutually beneficial deal there could open the way for cooperation on other fronts.

Moreover, there is nothing that threatens the future of the Middle East today more than the sectarian rift between Sunni and Shiite Muslims. This rift is being used by President Bashar al-Assad of Syria, Hezbollah and some Arab leaders to distract their people from fundamental questions of economic growth, unemployment, corruption and political legitimacy. It is also being used to keep Iran isolated and unable to fully exploit its rich oil and gas reserves, which could challenge some Arab producers. But our interest is in quelling these sectarian passions, not taking one side.

The Iran-U.S. cold war has prevented us from acting productively on all these interests.