Al-Milal wan-Nihal (Religions and Sects)

الملل والنحل

A pioneering work of comparative religion that catalogues and describes the major world religions and Islamic theological sects. Ash-Shahrastani describes each group's beliefs with relative objectivity, making this one of the first systematic works of religious studies. It covers Islamic sects, Judaism, Christianity, Zoroastrianism, Hinduism, and Greek philosophy.