Heresy, Empire, and Authority: Muslim–Christian Interactions in Early Modern Ottoman Legal Thought and Critical Edition of Ibn Kemāl’s Treatise on Zindīq

In early modern Islamic thought, the concept of zindīq (heretic) occupied a critical space at the intersection of theology, law, and state authority, particularly in the context of Muslim–Christian relations. One of the most significant scholarly attempts to define this term came from Ibn Kemāl (d. 940/1534), a leading Ottoman jurist and theologian, whose treatise Risāla fī mā yataʿallaq bi-lafẓ al-zindīq (Treatise on the Definition of the Word Zindīq) sought to clarify the precise meaning and legal implications of zandaqa (heresy). This article provides the first English translation and critical edition of Ibn Kemāl’s treatise, making this important work accessible to a wider scholarly audience. Through a close reading of the text, this study examines how Ibn Kemāl systematically distinguished zindīq from murtadd (apostate), mulḥid (disbeliever), and munāfiq (hypocrite), shaping Ottoman legal discourse on heresy. The present analysis further explores the theological and jurisprudential foundations Ibn Kemāl employed to define and punish heretics, particularly in light of the controversial execution of Mollā Kābid (or Mullā Qābiḍ, tr. Molla Kābız), who had asserted the superiority of Jesus over Muhammad. This case demonstrates the presence of polemical debates in the shaping of confessional boundaries in the ninth/fifteenth-century Ottoman Empire and reflects the broader challenges of Muslim–Christian interactions during this period. Additionally, this study investigates the broader implications of Ibn Kemāl’s classification of zindīq within the context of Muslim–Christian relations, considering how interfaith polemics and religious boundary-making influenced Ottoman legal thought. By contextualizing this treatise within early modern Ottoman legal and theological traditions, this study contributes to the understanding of how heresy was redefined in a multi-religious empire navigating theological, political, and interreligious challenges.