Iran is in a war that it did not choose in full, yet helped to script in part. The country is also in a leadership rupture that no missile can resolve. Outsiders will claim authorship of the outcome — Washington by force, Israel by daring, Russia or China by opportunism, Europe by handwringing. But Iran’s future, in the end, can only be decided by Iranians — by what they consent to build, and what they refuse to tolerate. That is not romantic nationalism. It is strategic realism.