Abū ʿAlī Muḥammad Ibn Khallād al-Baṣrī was a distinguished disciple of the Muʿtazilī theologian and founder of the Bahshamiyya, Abū Hāshim al-Jubbāʾī (d. 321/933). He is reported to have written a theological summa, Kitāb al-Uṣūl, as well as an autocommentary. None of the works of Ibn Khallād has come down to us directly, although substantial portions of his Kitāb al-Uṣūl and/or Sharḥ al-Uṣūl have reached us embedded in the Kitāb Ziyādāt Sharḥ...

The present volume--the first of its kind--deals with takfīr: accusing ones opponents of unbelief (kufr). Originating in the first decades of Islam, this practice has been applied intermittently ever since. The nineteen studies included here deal with cases, covering different periods and parts of the Muslim world, of individuals or groups that used the instrument of takfīr to brand their opponents--either persons, groups or even institutions--as unbelievers who should be condemned, anathematized or even persecuted. Each case presented is placed in its...

Islam at 250: Studies in Memory of G.H.A. Juynboll is a collection of original articles on the state of Islamic sciences and Arabic culture in the early phases of their crystallization. It covers a wide range of intellectual activity in the first three centuries of Islam, such as the study of ḥadīth, the Qurʾān, Arabic language and literature, and history. Individually and taken together, the articles provide important new insights and make an important contribution to scholarship on early Islam. The authors, whose work reflects an affinity with Juynboll's research interests, are all...