Univrsity Of Tehran Press Philosophy and Kalam 2008-9422 58 1 2025 08 19 Investigating the Efficiency of Mullā Ṣadrā’s Theory of Substantial Motion in Explaining the Transformation of Specific Forms Investigating the Efficiency of Mullā Ṣadrā’s Theory of Substantial Motion in Explaining the Transformation of Specific Forms 183 205 103221 10.22059/jitp.2025.385731.523559 FA Saeed Elahi Nasab MA, Department of lamic Philosophy and Theology, Faculty of Theology and Islamic Studies, Qom University, Qom, Iran. Mohammad Javad Zakavi MA, Department of lamic Philosophy and Theology, Faculty of Theology and Islamic Studies, Qom University, Qom, Iran. Journal Article 2024 11 23 The phenomenon of the transformation of forms (istiḥālat al-ṣuwar), or more precisely, the substitution of one specific form (ṣūrah) with another in the material world, is an issue that demands philosophical inquiry. Drawing on his philosophical foundations, Mullā Ṣadrā presents a novel analysis of this phenomenon through his theory of substantial motion (al-ḥarakat al-jawhariyya), which allows for change within the physical substance (jawhar), while also offering a serious critique of the classical theory of generation and corruption (al-kawn wa al-fasād). This research seeks to address the central question: Does analysis of the transformation of forms —given his critique of and shortcomings regarding the theory of generation and corruption (al-kawn wa al-fasād) and in light of his doctrine of substantial motion —provide an effective philosophical explanation? To answer this question, the paper employs library-based research and content analysis methods, focusing on primary and secondary sources relevant to the topic. First, the classical theory of generation and corruption is reviewed, with particular attention to the views of Ibn Sīnā and the criticisms put forward by Mullā Ṣadrā. Then, Ṣadrā’s theory of substantial motion and its implications for the analysis of the transformation of forms are discussed. In conclusion, the findings indicate that while Mullā Ṣadrā’s account of the transformation of forms offers a fundamentally distinct approach compared to the traditional view of generation and corruption, it ultimately faces similar conceptual challenges to those he identified in the classical position. The phenomenon of the transformation of forms (istiḥālat al-ṣuwar), or more precisely, the substitution of one specific form (ṣūrah) with another in the material world, is an issue that demands philosophical inquiry. Drawing on his philosophical foundations, Mullā Ṣadrā presents a novel analysis of this phenomenon through his theory of substantial motion (al-ḥarakat al-jawhariyya), which allows for change within the physical substance (jawhar), while also offering a serious critique of the classical theory of generation and corruption (al-kawn wa al-fasād). This research seeks to address the central question: Does analysis of the transformation of forms —given his critique of and shortcomings regarding the theory of generation and corruption (al-kawn wa al-fasād) and in light of his doctrine of substantial motion —provide an effective philosophical explanation? To answer this question, the paper employs library-based research and content analysis methods, focusing on primary and secondary sources relevant to the topic. First, the classical theory of generation and corruption is reviewed, with particular attention to the views of Ibn Sīnā and the criticisms put forward by Mullā Ṣadrā. Then, Ṣadrā’s theory of substantial motion and its implications for the analysis of the transformation of forms are discussed. In conclusion, the findings indicate that while Mullā Ṣadrā’s account of the transformation of forms offers a fundamentally distinct approach compared to the traditional view of generation and corruption, it ultimately faces similar conceptual challenges to those he identified in the classical position. https://jitp.ut.ac.ir/article_103221_0abddb1668a19573fefb0112ac98d693.pdf