This edited volume examines the rich and often contested discourse surrounding the belief in God’s oneness in Islam. Despite being a foundational tenet of faith, this doctrine has been the subject of intense debate across Islamic history, with scholars disagreeing on its precise nature, implications, and theological boundaries. Bringing together leading experts in theology, philosophy, and religious studies, this volume explores how different Islamic traditions have understood God’s uniqueness. It addresses key debates surrounding divine attributes, God’s relation to creation, and the problem of religious language, alongside the enduring tensions between philosophical reasoning and scriptural interpretations. The book also highlights intra-Muslim disagreements about the meaning of God’s oneness, from disputes between Sunni and Shia scholars to competing perspectives within kalām, legal thought and philosophical theology.
Wahid M. Amin is Senior Lecturer in Islamic Philosophy at the Al-Mahdi Institute and an Associate Lecturer in Islamic Studies at the University of Birmingham. Aaron W. Hughes is the Dean’s Professor of the Humanities and the Philip S. Bernstein Professor of Religious Studies in the Department of Religion and Classics at the University of Rochester. Sajjad H. Rizvi is Professor of Islamic Intellectual History and Islamic Studies at the University of Exeter.
List of Contributors
Introduction
Part 1: Contesting Monotheisms: A Judeo-Christian-Muslim Encounter
1. Religious Others and the Shaping of Orthodoxy in the Early Islamic Period
Aaron W. Hughes
2. The Influence of Christian Theology on the Development of Tawḥīd in Early Kalām
Romain Louge
3. On Religion: Ṣadrian Metaphysics as ‘Islam’s Argument’ (Ḥujjat al-Islām) against Henry Martyn
Sajjad H. Rizvi
Part 2: Sunnī Theological Perspectives on God and Monotheism
4. The Tawḥīds of Ibn Taymiyya
Jon Hoover
5. The Qurʾanic Argument for Monotheism: Controversies between al-Taftāzānī (d. 792/1390) and His Contemporaries
Syamsuddin Arif
Part 3: Shīʿī Theological Perspectives on God and Monotheism
6. Visions of Tawḥīd: Reconciling a Statement in the Twenty-Eighth Supplication of al-Ṣaḥīfa al-Sajjādiyya
Zoheir Esmail
7. Apophatic Tawḥīd: A Philosophical Account of Shīʿī Ismāʿīlī Theology
Khalil Andani
Part 4: Philosophical Perspectives on God and Monotheism
8. Mullā Ṣadrā and His Commentators on Ibn Kammūna’s Argument Against Divine Unity
Wahid M. Amin
9. Logico-linguistic Analysis of the Kalimat al-Tawḥīd: al-Rāzī vs al-Kūrānī
Yusuf Daşdemir
Part 5: Contemporary Perspectives on God and Monotheism
10. Divine Names for Interreligious Engagement
Celene Ibrahim
11. God as a Moral Agent: An Inquiry into the Nature of Divine Agency
Abolghasem Fanaei
12. Friendly (A)theism: A Philosophical-Theological Defence
S. Yaser Mirdamadi
13. Towards a Grammatical Approach to Monotheism: Unpacking Ṭabāṭabāʾī’s Theological Perspective
Javad Taheri
This is book is relevant to academics in Islamic philosophy and theology, academic libraries with a specialist in Islamic Studies, post-graduate students, and other faith-based scholars and communities with an interest in Islamic thought.