thumb|Juristic exchange between Abu Dawood and Ibn Hanbal. One of the oldest literary manuscripts of the Islamic world, dated October 879 AD. The main Sunni schools of law (madhhabs) are the Hanafi, Maliki, Shafi'i and Hanbali madhhabs. They emerged in the ninth and tenth centuries and by the twelfth century almost all jurists aligned themselves with a particular madhhab. These four schools recognize each other's validity and they have interacted in legal debate over the centuries. Rulings of these schools are followed across the Muslim world without exclusive regional restrictions, but they each came to dominate in different parts of the world. For example, the Maliki school is predominant in North and West Africa; the Hanafi school in South and Central Asia; the Shafi'i school in Lower Egypt, East Africa, and Southeast Asia; and the Hanbali school in North and Central Arabia. The first centuries of Islam also witnessed a number of short-lived Sunni madhhabs. The Zahiri school, which is commonly identified as extinct, continues to exert influence over legal thought. The development of Shia legal schools occurred along the lines of theological differences and resulted in formation of the Twelver, Zaidi and Ismaili madhhabs, whose differences from Sunni legal schools are roughly of the same order as the differences among Sunni schools. The Ibadi legal school, distinct from Sunni and Shia madhhabs, is predominant in Oman.
thumb|Juristic exchange between Abu Dawood and Ibn Hanbal. One of the oldest literary manuscripts of the Islamic world, dated October 879 AD. The main Sunni schools of law (madhhabs) are the Hanafi, Maliki, Shafi'i and Hanbali madhhabs. They emerged in the ninth and tenth centuries and by the twelfth century almost all jurists aligned themselves with a particular madhhab. These four schools recognize each other's validity and they have interacted in legal debate over the centuries. Rulings of these schools are followed across the Muslim world without exclusive regional restrictions, but they each came to dominate in different parts of the world. For example, the Maliki school is predominant in North and West Africa; the Hanafi school in South and Central Asia; the Shafi'i school in Lower Egypt, East Africa, and Southeast Asia; and the Hanbali school in North and Central Arabia. The first centuries of Islam also witnessed a number of short-lived Sunni madhhabs. The Zahiri school, which is commonly identified as extinct, continues to exert influence over legal thought The development of Shia legal schools occurred along the lines of theological differences and resulted in formation of the Twelver, Zaidi and Ismaili madhhabs, whose differences from Sunni legal schools are roughly of the same order as the differences among Sunni schools. The Ibadi legal school, distinct from Sunni and Shia madhhabs, is predominant in Oman.