Kitāb al–Milal wa al-Nihal (Arabic: كتاب الملل والنحل,The Book of Sects and Creeds), written by theIslamic scholarMuhammad al-Shahrastani (d. 1153CE), is a non-polemical study of religious communities and philosophies that had existed up to his time, considered to be the first systematicstudy of religion. It was written around 1127-1128 and divides religions between sects which have written doctrines and creeds and that which do not.
A French translation of the book by Gimaret, Monnot and Jolivet was sponsored byUNESCO (Livre des religions et des sectes. Leuven, Peeters: vol. I, 1986, Vol. II, 1993).