Jan Thiele is Reasearch scholar (Islamic studies) at the Freie Universität Berlin. He has published on the Zaydī reception of Muʿtazilī thought.Jan Thiele forscht als Islamwissenschaftler an der Freien Universität Berlin. Er hat zur zayditischen Rezeption muʿtazilitischer Theologie publiziert.

"L’auteur situe l’ouvrage d’al-Raṣṣāṣ dans les débats de l’époque, expose avec pertinence et clarté l’histoire mouvementée et les ramifications de la réception de la pensée muʿtazilite par les Zaydīs […], et parvient à montrer ce qui fait l’importance des questions abordées dans le Kitāb al-muʾathhirāt, dont il recherche aussi les possibles sources."Cécile Bonmariage in Revue Philosophique de Louvain 110.2 (2012), 362-363.“The author enriches the library of Muʿtazilī studies with this fine critical edition and study of Kitāb al-Muʾaththirāt. Moreover, the book also fills a gap in the field of later Muʿtazilī treatments of agents and helps to make more distinguishable the division into early, classical and later Muʿtazilī thought. The study also increases awareness of the Yemeni-Zaydī context of Muʿtazilī kalām. Certainly, Muslim intellectual historians, theologians, philosophers and specialists in legal hermeneutics should welcome this publication.”Abdessamad Belhaj in Al-Masāq, Vol. 26, No. 2 (2014).“… the study by J. Thiele is very welcome of a treatise on this crucial topic of both Islamic theology and Graeco-Arabic philosophy by al-Ḥasan al-Raṣṣāṣ, a theologian of Zaydite allegiance5 who was active in Yemen in roughly the same years when in the Muslim West Averroes was coming to grips with Ašʿarite theology, al Ġazālī, and Kalām in general.”Cristina D’Ancona in Studia graeo-arabica 4 (2014).