The religions and sects

The book "Al-Milal wal-Nihal" is a work authored by Abu al-Fath al-Shahrastani, and is considered one of the most important references in comparative study of religions, sects, and Islamic schools of thought, in addition to other non-Islamic religions. The book aims to classify the people of the world according to their opinions and sects, whether they are followers of religions or desires and sects.