During the eight years of Mahmoud Ahmadinejad’s presidency, Iran has become an increasingly dangerous place. That danger, however, is not posed by nuclear weapons – which remain an uncertain and, at worst, long-term threat – but more urgently from Iran’s own self-imposed collapse. Far worse than Mr. Ahmadinejad’s comic-book sabre-rattling at Israel and the West, worse than his increasingly ineffective support of extremists and demagogues, has been his effect on his own country. A decade ago, Iran was a hopeful place, moving away from the excesses of its theocratic revolution and into the outer edges of normalcy and co-operative relations with the world. The Ahmadinejad era reversed that, plunging the country into self-isolation, poverty, mismanagement and paranoia.

