Authority in Ibadi Islam is structured through a combination of textual transmission, lineage of teachers, and localized institutions that determine who may teach, adjudicate, and lead. This chapter examines the ways the tradition preserves knowledge, confers legitimacy, and negotiates interpretive authority — from early scriptural anchors to later jurists and community councils — with attention to concrete places, practices, and historical moments.
Central textual authorities are, first and foremost, the Qur’an and, secondarily, collections of hadith and legal opinions that are specific to Ibadi lines of transmission. Adherents and scholars point to early transmitters such as Jabir ibn Zayd (d. c. 711) as authoritative nodes in the hadith chains used by Ibadi jurists; his narrations, preserved in Ibadi compilations, form part of the community’s foundational corpus. These chains are not identical to the Sunni canonical collections (al-Bukhari, Muslim), but they are internally coherent and serve the community’s legal needs. The survival of manuscript collections — for example, medieval Ibadi legal manuals, fatwa compendia, and commentaries preserved in Omani repositories (notably in cities such as Nizwa and Rustaq), in the M’zab valley (Ghardaïa) libraries, and in Maghrebi archival holdings — provides verifiable evidence of textual continuity. Some of these manuscripts date from the medieval period; others are early modern copies or later commentaries that attest to ongoing scholarly engagement.
The methods of transmission are varied and combine oral and written techniques. Oral pedagogy remains important: students continue to learn by attending majalis (study circles) in mosque complexes and private homes, where a teacher reads, explains, and debates texts. The ijaza (teaching authorization) system, widespread across Islamic scholastic cultures, certifies a person’s competence to teach a text or legal discipline; in Ibadi contexts such authorizations have often been locally conferred by prominent scholars or by councils of elders. Ijazas carried within chains that can be traced backwards through named teachers, a practice that both preserves lines of learning and establishes the social credit of the teacher. Modern seminaries and university faculties have further institutionalized these lines of transmission: for example, faculties of Islamic studies at universities in Muscat and in Nizwa, as well as theological programs in regional centers of the Maghreb, regularly produce graduates who engage in public teaching, mosque leadership, and legal consultation.
Structures of clerical and political authority in Ibadi history differ from hierarchical priesthoods seen in some religions. The office of the imam functions differently across history and geography. Adherents hold that in early and medieval periods the imam could exercise combined religious, juridical, and political authority; in Omani history the imamate (established in various forms from the early Islamic era) often entailed leadership recognized by councils of tribal and scholarly elites. The Yaruba period in Oman (17th–18th centuries) is one example of a time when Ibadi political structures were prominent in state affairs; similarly, the Rustamid imamate, with its capital at Tahert (modern-day near Tiaret, Algeria), controlled a polity from roughly the late eighth century until its fall in the early tenth century (commonly dated c. 776–909). The Rustamid polity fused ecclesiastic and civic functions and produced administrative and juridical records that scholars have used to reconstruct Ibadi public law. By contrast, many contemporary Ibadi communities now operate within modern nation-states where the imam’s role may be primarily liturgical or pastoral rather than political. This variation reflects a broader principle within the tradition: legitimacy can rest on communal selection (shura) and on learned qualification, and the balance between those bases of authority often depends on local circumstance.
Who is authorized to adjudicate legal questions? Historically, certain jurists — sometimes designated as muftis or qadis — gained standing through scholarship, demonstrable command of the local legal corpus, personal piety, and communal acceptance. In medieval and early modern contexts, qadis issued judicial decisions (ahkam) that were recorded and, in some cases, circulated among other communities, contributing to an emerging body of jurisprudence. In places such as the M’zab valley (a fortified agglomeration of towns including Ghardaïa) and in the hill towns of Jabal Nafusa in present-day Libya, juristic authorities often worked in tandem with councils of elders to mediate disputes, regulate family law, and adjudicate commercial questions, producing local legal practices adapted to social realities.
Transmission also involves commentary and debate. Medieval Ibadi scholars produced commentaries on earlier texts, legal primers, and polemical treatises engaging with Mu‘tazilite, Sunni, and Shia positions; the presence of such written commentaries shows a vibrant and dialogical scholarly culture. Modern historians and philologists — among them John C. Wilkinson and other specialist researchers — have shown that manuscript repositories in Oman, the M’zab, and North Africa preserve treatises that allow reconstruction of interpretive lineages and methodological shifts over centuries. In recent decades, targeted cataloguing projects and selective digitization efforts, undertaken by national libraries, university projects, and collaborative research teams, have increased scholarly access to Ibadi manuscripts, enabling comparative study and wider dissemination of texts formerly available only in local archives.
Authority is not uncontested. Internal debates over the degree of openness to modern educational methods, the proper relation between mosque and state, and the boundaries of acceptable theological interpretation show that authority is continually negotiated. During the twentieth century, especially in the course of state formation and legal modernization, debates emerged in Ibadi circles about how to adapt classical jurisprudence to codified national law: some jurists favored codification and cooperation with state institutions to ensure legal clarity and integration, while other scholars and community leaders advocated measures to preserve autonomous communal practices, particularly in family law and local dispute resolution. In the M’zab valley, tensions between collective autonomy and state integration have likewise produced negotiations about who speaks for the community in relation to municipal and national authorities.
Institutional mechanisms for transmitting authority include madrasas, scholarly families, and councils of notables (majlis). In the M’zab, for example, governance historically combined councils of elders with juristic authorities who mediated disputes and maintained social order; this arrangement produced a durable social fabric and an orderly method for conferring authority within the towns. In Oman, the interplay between tribal leadership and scholarly legitimacy shaped which figures were accepted as imams, qadis, or community arbiters. Across regions, certain families became known for producing successive generations of teachers and jurists, thereby consolidating local trust in their interpretive competence.
A crucial comparative point concerns the absence of a single transregional ecclesiastical center. Unlike Roman Catholicism with a papal center, or the medieval Sunni world in which a few major cities (Baghdad, Cairo, Damascus, Cordoba) served as cross-regional hubs for legal schools, Ibadi Islam never developed a single centralized hierarchy that governed all adherents. This decentralization is both a strength and a constraint: it fosters local adaptability and resilient communal structures, allowing practices to respond to specific social environments, but it also means that doctrinal and legal uniformity is less pronounced across the Ibadi world. In the contemporary era some networks of scholars, conferences, and publication series have attempted greater cross-regional coordination, yet these remain associative rather than institutional in the sense of a single governing center.
Finally, transmission in the modern era involves print, broadcast media, and the internet. The digitization of Ibadi manuscripts, the publication of legal manuals and sermonic collections, and the translation of key studies into modern Arabic and European languages have broadened access to the tradition’s resources. At the same time, new media have introduced debates over authority that hinge on who may interpret scanned manuscripts, issue legal opinions online, or represent Ibadi teachings in diasporic contexts (for example, in communities in East Africa and the Indian Ocean islands such as Zanzibar and the Comoros). The ongoing negotiation between time-honored teacher-student chains and modern institutional technologies is among the most important features of Ibadi authority in the contemporary period, and it continues to shape how knowledge is preserved, transmitted, and contested within the tradition.