The Umayyad caliph remembered as a model of piety and justice — sometimes called the "fifth Rightly Guided caliph" — who tried to reform the dynasty from within in a reign of barely two years.
Life
Umar ibn Abd al-Aziz — Umar II in the caliphal count — was born in Medina around 682, an Umayyad of the ruling house through his father and an heir of the Rashidun through his mother: Umm Asim, granddaughter of [Umar ibn al-Khattab](https://johnshaqi.com/figures/umar-ibn-al-khattab). Raised in Medina among the last of the companions' students, he served as its governor under al-Walid (706–712) — his council of the city's ten jurists is in [Ibn Sa'd](https://johnshaqi.com/islam/history/ibn-sad-tabaqat) — until his protests against al-Hajjaj's severities cost him the post. On the death of his cousin Sulayman in 717, by a testament Raja ibn Haywa transmitted, the caliphate came to him unsought — the sources record his first act was to release the ceremonial mounts and return to his own mule.
His reign lasted twenty-nine months. In them the tradition places the great fiscal rescript equalizing the mawali (non-Arab converts) with Arab Muslims, the recall of the army wasting before Constantinople, the end of the cursing of [Ali ibn Abi Talib](https://johnshaqi.com/figures/ali-ibn-abi-talib) from the pulpits, the return of Fadak's revenues to the family of the Prophet, and the first officially commissioned collection of hadith — his letter to Abu Bakr ibn Hazm is preserved in [al-Bukhari](https://johnshaqi.com/hadith/sahih-al-bukhari)'s own chapter headings. He died at Dayr Siman near Aleppo in February 720, aged around thirty-seven — poisoned, by the persistent early transmission, at the instance of kinsmen whose revenues he had cut; his simple grave there stands yet, spared — the histories note — when the Abbasids opened the Umayyad tombs.
Struggles & Trials
Umar's struggle was with his own house. The Umayyad establishment he inherited ran on privileges he judged unlawful: crown estates assembled by confiscation, stipends flowing by descent rather than service, the mawali taxed as if unconverted. The sources — [Ibn Sa'd](https://johnshaqi.com/islam/history/ibn-sad-tabaqat), the biographies, Abu Muhammad ibn Abd al-Hakam's early sira of him — record the method: he began with himself and his wife Fatima bint Abd al-Malik, stripping their own estates and her jewels to the treasury, then the family's, against their documented fury; the transmitted complaint of his kin — that he was starving the house of Marwan — sits beside his transmitted answer, that he feared the Fire more than their anger.
He fought the empire's machinery of abuse with appointments: the dismissal of al-Hajjaj's school of governors, the standing order that the wronged of any province might come to him at state expense. And he fought time: the sources present the twenty-nine months as a race between reform and the death his kinsmen — by the poisoning transmission — finally arranged. His recorded refusal to name the poisoner, and his pardon of him, close the biographies.
Teachings & Character
The tradition made Umar II its proof that the Rashidun standard could return: the fifth rightly-guided caliph in a judgment transmitted from the earliest generations, and the model the jurists cite for the mujaddid — the renewer promised at each century's head. His maxims belong to the classical stock of Islamic political ethics: the inaugural refusal of the caliphate until the people freely chose him; "the people are not your slaves"; the lamp he extinguished when state business ended and family talk began — anecdotes carried by [Ibn Sa'd](https://johnshaqi.com/islam/history/ibn-sad-tabaqat) and the biographers as the curriculum of just rule.
Two institutional acts outweigh the anecdotes. The fiscal rescript — equal treatment of the mawali, taxation reformed to protect the convert and the dhimmi's lawful dues alike — turned the empire's law toward the universalism the Quran's polity claimed. And the hadith commission — his letters to Ibn Hazm and, by the wider transmission, to al-Zuhri, ordering the Prophet's knowledge written before its bearers died — stands at the head of the whole written hadith tradition; [Muwatta Malik](https://johnshaqi.com/hadith/muwatta-malik) and every collection after it descend from the enterprise he authorized.
Campaigns & Conflicts
Umar II is the rare caliph remembered for ending wars. He inherited the greatest siege the empire had mounted — Maslama's army rotting before Constantinople through the winter of 717–18 — and recalled it, absorbing the prestige cost; the histories record the decision as deliberate husbandry of Muslim lives against a wall that would not fall. He pulled back exposed garrisons beyond the Oxus and in the far Maghrib, refused new conquests, and answered the Kharijite rising of Shawdhab in Iraq first with a disputation — the exchange is preserved — and only then with arms, instructing his commander to fight only if the rebels shed blood.
His governors' instructions, transmitted in the biographical literature, reversed the conquest-state's habit: no war for revenue, no coercion of conversion — his answer to the complaint that conversions were emptying the jizya rolls is the era's most quoted fiscal sentence: "God sent Muhammad as a guide, not as a tax-collector." The frontier the warrior-caliphs had stretched, he consolidated; within a generation the Abbasid revolution would inherit the equities he had conceded.
Contested & Debated
Umar II is that rarity, a ruler both traditions bless: Sunni Islam counts him with the Rashidun and the mujaddids; Shia memory honors the caliph who ended Ali's cursing from the minbars and restored Fadak's usufruct to the Prophet's house — acts recorded by [al-Tabari](https://johnshaqi.com/islam/history/tabari-tarikh) and the biographers. The disputes around him are the record's edges. The poisoning: transmitted early and widely, doubted by some critics as too neat a martyrdom; both stand in the literature. His Umayyad kin's counter-case — that his fiscal rigor endangered the state and that his successor Yazid II's reversal proved its impracticality — is itself documented, and some modern historians read his reforms as the pragmatic management of a fiscal crisis rather than pure piety; the sources accommodate both.
Within Shia assessment a reserve remains — an Umayyad is an Umayyad, and restitution is not designation — while Sunni hagiography's very enthusiasm has drawn source-critics' scrutiny of the more perfect anecdotes. The entry, per the platform's law, reports the shared reverence, the reservations, and the transmissions' seams as they stand.
Legacy
Twenty-nine months bought Umar II a rank among centuries: the fifth of the rightly-guided in the tradition's transmitted judgment, the first mujaddid, the proof-text — cited from the classical mirrors-for-princes to modern reform movements — that Islamic rule is answerable to law and that a treasury can be given back. The written hadith tradition, the equalization of the convert, and the ended cursing of Ali are permanent facts of Islamic history that date from his decree.
The Abbasids, who opened Umayyad graves, left his untouched — the tradition's own image for a reputation no dynasty dared insult. Jurists cite him on taxation and restitution; Sufis on the ascetic throne; reformers of every century on the possibility he proved. The caliph who reigned shortest among the great ones is measured, in the tradition's ledger, by what he returned rather than what he took — and remains, across the traditions' divides, the least disputed just ruler Islam remembers after the first four.