The nuclear accord reached between the P5+1 states and Iran in Geneva during the early hours of Nov. 24 was a heartwarming sign that the international system can still produce diplomatic solutions. It is a success story for Iranian President Rouhani as much it is for the Barack Obama administration. If former Iranian president Mahmoud Ahmedinajad’s extremism and irrationalism had not been replaced by Rouhani’s realism and rationalism — in other words, if Iran’s foreign policy had not truly been "reset" — the world would not feel as at ease as it does right now.

The Iranian example highlights the prerequisite that countries unclog blockages in their foreign policies caused by extremist and fantasizing leaders by changing the actors who cause such obstacles. It is hoped that the fears of some journalists closely following the Geneva process will not come true, and the planned final negotiations will avoid becoming a hostage of the Syrian crisis.

The hope is also that the six-month accord just reached will not be undermined by questions that might arise and disagreements that could erupt. Furthermore, it is desired that radical power centers in Iran refrain from shooting down the process and that a "happy ending" is possible for all. Only then can Iran, as an unshackled actor free from isolation, containment and embargo, take its deserved place in the arena and receive what is due to it. Only then can one speak of a new "Eurasian balance."

If this positive scenario materializes, Turkey will of course be among the countries to accrue significant benefits to its security and economy. That said, Turkey will also have to confront new challenges.