Sunnah
Ahl-i-Sunnat wal jama'at. They from about 85% of the total number of Muslims.
The largest branch of Islam is Sunnis that reach more than 85% of all Muslim population.
They are called Muslim Shiites or Muslim Shiias
Sunnis
Sunni (Sunnism) is the largest branch of Islam it is known as Orthodox Islam.Shia (Shiaism) is the second largest denomination of Islam, Ismāīlism is a branch of Shia Islam, it is a sect of Shiaism, as are the mainstream Twelvers. The Aga Khan is the hereditary title of the Imam of the largest branch of the Ismā'īlī followers.
Islam is a religion - therefore the answer is Islam.
There used to be a central authority for Sunna Islam - the largest branch of Islam. That was called the Caliph. However, for almost a century now, there is no such central authority.
ISLAM
Islam
Islam is the second largest religion: behind Christianity
Islam
Shia Muslims are a sect of Islam who believe that leadership should have been passed down through the Prophet Muhammad's lineage. They follow a different set of religious practices and have a distinct understanding of Islamic history compared to Sunni Muslims. Shia Islam is the second largest branch of Islam, after Sunni Islam.
The division between Sunnis and Shiits is the largest and oldest in the history of Islam.
the legislative branch