Mehdi Berriah is a researcher in Islamic Studies and Islamic History at the French Institute for the Near East (Ifpo). His work focuses on Muslim thought, theology, jihad, Ibn Taymiyya, and the intellectual, political, military, and social history of the Islamic world. Arjan Post is Associate Professor of Arabic and Islamic Studies at KU Leuven. His fields of interest include Sufism, kalām, theology, and the intellectual history of the Hanbali school, specifically during the Mamluk period.