Al-Shahrastani

Tāj al-Dīn Abū al-Fath Muhammad ibn `Abd al-Karīm ash-Shahrastānī, also known as Muhammad al-Shahrastānī, was an influential Persian historian of religions, a historiographer, Islamic scholar, philosopher and theologian. His book, Kitab al-Milal wa al-Nihal was one of the pioneers in developing an objective and philosophical approach to the study of religions.