Chapter two presents the views of the prominent Sunni scholar ʿAbd al-Malik al-Juwaynī (d. 478/1085) in his Succour of Nations Amidst the Confusion of Darkness (Ghiyāth al-umam fī iltiyāth al-ẓulam). If early Sunni theologians conceived of the imamate in theological terms that strictly adhered to precedence, while later jurists understood the office in pragmatic and legal terms, then al-Juwaynī was a representative of the latter approach. Unlike many of his predecessors, al-Juwaynī came to terms with the termination of the ideal early caliphate. He endeavoured to provide a political theory that accommodated rulers who met the minimum requirements of Islamic law. A key thesis of al-Juwaynī is that jurists are essential to the governing process and that without them, a state would fail, thus, he posits the ruler’s consultation of jurists as a key source of his legitimacy. Furthermore, al-Juwaynī rejects the claim that a legitimate ruler must possess many of the ideal qualities associated with the early caliphs in Islamic history.

One of the most enduring sources of conflict among Muslims is the question of who or what represents legitimate power and authority after the Prophet Muhammad. This introduction briefly examines the diverse answers that key representatives of the classical Islamic tradition offered to this controversial question. A concise overview of early Islamic political history is followed by a survey of Islamic thought on the subject of authority in the formative (seventh-ninth centuries) and classical periods (ninth-thirteenth centuries). This introduction presents the views of six major theological schools of the classical period: Ashʿarism (representative of Sunnism), Muʿtazilism, Ibadism, Twelver Shiʿism, Ismaʿilism, and Zaydism. Finally, this chapter discusses the classical Arabic texts that appear in English translation in this anthology as well as their respective themes, authors, and historical contexts.

Chapter seven presents the views of a prominent leader of the Mustaʿlī Ṭayyibī branch of the Ismaʿili community, al-Dāʿī ʿAlī b. Muḥammad b. al-Walīd (d. 612/1215). Ibn al-Walīd was a prolific writer who authored several works on philosophy, theology, poetry, and commentary on the Qurʾān. He concisely explains key Islamic doctrines (monotheism, prophethood, the Hereafter, etc.) according to the Mustaʿlī Ṭayyibī tradition in his theological work, The Crown of Doctrines and the Mine of Instructive Points (Tāj al-ʿaqāʾid wa-maʿdin al-fawāʾid). The doctrines he supports in his chapter on the imamate largely correspond with those that appear in Twelver Shiʿi literature. He argues against the right of members of the community to choose their imams and endorses the need for their appointment by means of divine designation (naṣṣ). He believes in the perpetual necessity of the office and asserts that the nonexistence of a divinely designated imam is impossible; the imam is God’s living proof (ḥujja). The Ismaʿilis maintained that God’s proof played an essential role in humans’ acquisition of any knowledge relating to God or matters pertaining to religion that God desired humanity to know.

Chapter three presents the views of the prominent Zaydī scholar al-Nāṭiq bi-’l-Ḥaqq Abū Ṭālib al-Hārūnī (d. 424/1033) in his Theoretical Underpinning of the Imamate (al-Diʿāma fi tathbīt al-imāma). Al-Nāṭiq draws on key Muʿtazili concepts and technical terms to propound a comprehensive argument in defence of the Zaydi conception of the imamate while refuting the doctrines of his Muʿtazili, Sunni, and Twelver Shiʿi peers. Against the Twelvers, al-Nāṭiq sought to refute three assumptions: the rational necessity of the imamate, the necessity of infallibility, and the necessity of divine designation (naṣṣ). He was intimately familiar with Twelver doctrines because his father and larger family identified as Twelvers. Al-Nāṭiq’s Theoretical Underpinning became as a seminal work on the Zaydi imamate.

Chapter five presents the views of the prominent Muʿtazili scholar Rukn al-Dīn Ibn al-Malāḥimī (d. 536/1141) in his Book of Excellence on the Fundamental Principles of Religion (Kitāb al-Fāʾiq fī uṣūl al-dīn). The Book of Excellence, which is extant in full, is a summary of his larger work, a comprehensive theological summa entitled The Reliable Book on the Fundamental Principles of Religion (al-Muʿtamad fī uṣūl al-dīn), of which only parts survive. The Book of Excellence is an important source for contemporary researchers since it is one of the last available texts from the Sunni Muʿtazili tradition, which disappeared by the end of the classical period in the seventh/thirteenth century. Ibn al-Malāḥimī’s chapter on the imamate, in particular, represents this tradition’s views up until the sixth/twelfth century. It justifies the Muslim community’s right to select its own leaders and affirms the legitimacy of the first four caliphs. Ibn al-Malāḥimī also defends ʿAli’s character against accusations of wrongdoing, while refuting Imami doctrines about his designation (naṣṣ) and infallibility.

Chapter six presents the views of the Ibāḍī scholar Abū ʿAmmār ʿAbd al-Kāfī b. Yūsuf al-Warjalānī (d. ca. 570/1174) in his Concise Book (al-Mūjaz). In this work, al-Warjalānī defends those doctrines that he considers to be correct and refutes the views of rival religious traditions, both Muslim and non-Muslim. His chapter on the imamate provides a broad overview of Khārijī and Ibāḍī views on the qualities of a legitimate imam. The function of the imam is to aid the community in commanding right, forbidding wrong, establishing justice, and administering ḥudūd (fixed, nondiscretionary penalties). The Khārijī-Ibāḍī tradition is unique in outlining a procedure for the removal of an imam. If an imam violates a divine commandment, he should be compelled to seek repentance. Repeat offenses or a refusal to repent are grounds for disqualification and removal from office. If an imam refuses to give up his authority, he is to be fought until he is dislodged from power or killed. For the Ibāḍīs, cancelling the authority of an imam to restart the selection process and appoint another is considered a legitimate procedure. When the Ibāḍīs do not have the ability to appoint imams, their doctrine permits them to dissimulate and live peacefully among non-Ibāḍī Muslims.

Chapter four presents the views of the prominent Twelver Shiʿi scholar Muḥammad b. al-Ḥasan al-Ṭūsī (d. 460/1067). Like other Zaydis and Twelver Shiʿis of his era, al-Ṭūsī incorporated Muʿtazili doctrines into his writings on theology. His seminal work on the imamate is an abridgment of The Curative Book (al-Shāfī) by al-Sharīf al-Murtaḍā (d. 436/1044). Al-Ṭūsī’s work was similarly entitled The Curative Book on the Imamate: A Paraphrastic Rendering (Talkhīṣ al-Shāfī fī al-imāma) and reflected his own understanding of the text. Both al-Murtaḍā and al-Ṭūsī ground the Twelver conception of the imamate in Bahshamī Muʿtazili theology to argue for the rational necessity of the imamate and its necessity according to the Qurʾan and hadith. They accomplish the former by tying the existence of imams to the existence of moral obligations (taklīf) in the sight of God. As long as moral obligations exist, humans need imams who function as a type of divine assistance (luṭf).