Islamic sects refer to the various branches within the Islam religion, each with its own beliefs and practices. The two largest sects are Sunni and Shia. Sunnis make up about 85-90% of the Muslim population, while Shia Muslims account for around 10-15%. The primary difference between them originated from a dispute over the rightful successor to the Prophet Muhammad after his death. Within these main sects, there are further subdivisions. For example, Sunnism includes groups like Hanafi, Maliki, Shafi'i, and Hanbali, which differ in legal interpretations. Similarly, Shia Islam has branches such as Twelvers and Ismailis. Each sect contributes to the rich diversity of beliefs and practices in the Islamic faith.