In a lesson for many other countries around the world, it takes about a generation (35 years in the case of Iran) with a steady hand at the helm to be considered stable enough to be taken seriously.
Regardless of whether the nuclear deal with world powers pans out or not, the ayatollahs of Iran have proven they can run a steady ship with good popular support.
Israel's genuine irritation with the nuclear deal, and rather desperate attempts at sabotaging it, shows that there are no back-room deals as it has with other Middle East countries.
Perhaps not perfect, but the Iranian form of government has proven itself viable. It is not a monarchy or dictatorship and it is impervious to foreign intervention. And it now commands the world's respect. Not bad!