who seceded") are an extinct sect who originated during the First Fitna, the struggle for political leadership over the Muslim community, following the assassination in 656 of the third caliph Uthman. Kharijites originally supported the caliphate of Ali, but then later on fought against him and eventually succeeded in his martyrdom while he was praying in the mosque of Kufa. While there are few remaining Kharijite or Kharijite-related groups, the term is sometimes used to denote Muslims who refuse to compromise with those with whom they disagree. Sufris were a major sub-sect of Kharijite in the 7th and 8th centuries, and a part of the Kharijites. Nukkari was a sub-sect of Sufris. Harūrīs were an early Muslim sect from the period of the Four Rightly-Guided Caliphs (632–661 CE), named for their first leader, Habīb ibn-Yazīd al-Harūrī. Azariqa, Najdat, and Adjarites were minor sub-sects. Ibadi Islam The only Kharijite sub-sect extant today is Ibadism, which developed out of the 7th century CE. There are currently two geographically separated Ibadi groups—in Oman, where they constitute the majority of the Muslim population in the country, and in North Africa where they constitute significant minorities in Algeria, Tunisia, and Libya. Similarly to another Muslim minority, the Zaydīs, "in modern times" they have "shown a strong tendency" to move towards the Sunnī branch of Islam. Schools of Islamic jurisprudence Islamic schools of jurisprudence, known as madhhab, differ in the methodology they use to derive their rulings from the Quran, ḥadīth literature, the sunnah (accounts of the sayings and living habits attributed to the Islamic prophet Muhammad during his lifetime), and the tafsīr literature (exegetical commentaries on the Quran). Sunnī Sunnī Islam contains numerous schools of Islamic jurisprudence (fiqh) and schools of Islamic theology (ʿaqīdah). In terms of religious jurisprudence (fiqh), Sunnism contains several schools of thought (madhhab): the Ḥanafī school, founded by Abū Ḥanīfa al-Nuʿmān (8th century CE); the Mālikī school, founded by Mālik ibn Anas (8th century CE); the Shāfiʿī school, founded by Muḥammad ibn Idrīs al-Shāfiʿī (8th century CE); the Ḥanbalī school, founded by Aḥmad ibn Ḥanbal (8th century CE); the Ẓāhirī school, founded by Dāwūd al-Ẓāhirī (9th century CE). In terms of religious creed (ʿaqīdah), Sunnism contains several schools of theology: the Atharī school, a scholarly movement that emerged in the late 8th century CE; the Ashʿarī school, founded by Abū al-Ḥasan al-Ashʿarī (10th century CE); the Māturīdī school, founded by Abū