Chapter Forty-Two: The Profound Collapse: Systemic Breakdown and Ideological Failure at the End of the Sasanian Era

Introduction In the annals of imperial collapse, few transformations have been as swift or as comprehensive as the fall of the Sasanian Empire between 628 and 651 CE. The empire that had for four centuries stood as Rome's great rival in the East, the self-proclaimed guardian of Zoroastrian civilization and the embodiment of Iranian royal glory, dissolved with a rapidity that stunned contemporaries and continues to fascinate historians. The Byzantine chronicler Theophanes, writing in the early ninth century, captured something of this bewilderment when he noted that "the kingdom of the Iranians, which had endured for so many generations, was utterly overthrown in the space of fourteen years." Yet this was no mere military conquest by a superior force. The collapse of Iranshahr—as the Iranians themselves called their realm—represented something far more profound: the systematic breakdown of an entire imperial order that had shaped the political, cultural, and religious...