Abbas Amanat, a historian of Iran, observed that one of the keys to Iran’s civilizational longevity, which dates to the Persian Empire of 2,500 years ago, is the power of its culture to co-opt its military invaders. “For nearly two millenniums, Persian political culture and, in a broader sense, a repository of Persian civilizational tools successfully managed to convert Turkic, Arab and Mongolian conquerors,” he told me. “Persian language, myth, historical memories and timekeeping endured. Iranians persuaded invaders to appreciate a Persian high culture of poetry, food, painting, wine, music, festivals and etiquette.”