Umar ibn Abd al-Aziz

Umar ibn Abd al-Aziz ibn Marwan (Arabic: عُمَر بْن عَبْد الْعَزِيز بْن مَرْوَان, romanized: ʿUmar ibn ʿAbd al-ʿAzīz ibn Marwān; c. 680 – February 720), commonly known as Umar II, was the eighth Umayyadcaliph, ruling from 717 until his death in 720. His reign was marked by significant central government reforms aimed at improving administration and social equality. These efforts included the first official collection of hadiths and a robust promotion of the Sunnah. Economically, he sought to stabilize the state by implementing a tax reform that granted equality to non-Arab Muslims (mawali) by exempting them from the jizya, while protecting public lands from dynastic privatization. These policies aimed to reconcile the financial needs of the state with the principles of Islamic justice.

Burdened by the severe financial strain and heavy casualties of the Siege of Constantinople, Umar executed a pivot in state defense. He ordered the withdrawal of Muslim forces from exposed northern fronts, including Constantinople and Cilicia, to consolidate defenses around the Syrian heartland. Despite a general de-escalation of large-scale offensive campaigns, his administration continued localized military operations, overseeing the fortification of Narbonne in Septimania.

He is regarded by many Muslims as the fifth rightly guided caliph and was widely viewed by contemporaries as the Mahdi, due to his reputation for piety, generosity, asceticism, and a profound sense of justice. This designation relies on a historiographical tradition that limits the rightly guided caliphate to thirty years, a calculation that encompasses the brief caliphate of Hasan ibn Ali (661) as part of his father's rule. Widely celebrated for his singular opposition to the perceived tyranny of other Umayyad rulers, his legacy remains unique in Islamic history, and both early critics and later Abbasids spared his memory and his descendants from the systematic desecration applied to other members of the Umayyad dynasty.