The book analyses all extant works by Ibn Jarir al-Tabari (d. 224/839-310/923), referring to their individual methodologies; their legacy as al- madhhab al-jariri; and their scholarly and socio- political context. Through the study of al- Tabari’s works, the book addresses research debates over dating the legal and scholarly institutions and their disciplines; authorship and transmission of scholarly writings; political theory and administration; and ‘origins’ of the Qur'an and Islam. Al-Tabari defined the Qur'an in linguistic and legal terms. The linguistic terms refer to rhetoric and semiotics, and the legal to theories of social contract, ‘natural law’, and rule of law. Both sets of terms go into al-Tabari’s theory of prophecy and administration, including of ‘minorities’. By engaging current debates about the usefulness or not of the medieval Muslim scholars in research on the Qur'an and early Islam, this book argues that the - 2 - 20:59 contribution of each medieval scholar be assessed on an individual basis. Al-Tabari’s philosophical, ethical, historical, linguistic, and legal education produced analysis of the Qur'an and ‘origins’ of Islam that stands up to some fronts in contemporary research. The book thus adds to research on al-Tabari; early Islamic disciplines and institutions; and the Qur'an and early Islam.