ROME – Why does Iran matter so much to the rest of the world? There are at least three reasons. First, Iran has become a key test case of the international community’s capacity to prevent nuclear proliferation, which would make the world increasingly unpredictable and dangerous. Second, Iran matters for the future stability of the Middle East, where its influence as well as the influence of the Shiites is on the increase. Third, Iran matters for the stabilization of neighboring Afghanistan.