After

Muhammad Muhammad ( ar, مُحَمَّد; 570 – 8 June 632 CE) was an Arab religious, social, and political leader and the founder of Islam. According to Islamic doctrine, he was a prophet divinely inspired to preach and confirm the mon ...

's death, the disputed question of who should be the successor (

Caliph A caliphate or khilāfah ( ar, خِلَافَة, ) is an institution or public office under the leadership of an Islamic steward with the title of caliph (; ar, خَلِيفَة , ), a person considered a political-religious successor to th ...

) to Muhammad's political authority led eventually to the division of Islam into

Sunni Sunni Islam () is the largest branch of Islam, followed by 85–90% of the world's Muslims. Its name comes from the word '' Sunnah'', referring to the tradition of Muhammad. The differences between Sunni and Shia Muslims arose from a dis ...

and

Shia Shīʿa Islam or Shīʿīsm is the second-largest branch of Islam. It holds that the Islamic prophet Muhammad designated ʿAlī ibn Abī Ṭālib as his successor (''khalīfa'') and the Imam (spiritual and political leader) after him, mos ...

. Sunni's believe that he should be elected, whereas Shia believe in divinely ordained infallible twelve Shi'a

Imam Imam (; ar, إمام '; plural: ') is an Islamic leadership position. For Sunni Muslims, Imam is most commonly used as the title of a worship leader of a mosque. In this context, imams may lead Islamic worship services, lead prayers, serve ...

s for leadership after Muhammad. The

Ismaili Isma'ilism ( ar, الإسماعيلية, al-ʾIsmāʿīlīyah) is a branch or sub-sect of Shia Islam. The Isma'ili () get their name from their acceptance of Imam Isma'il ibn Jafar as the appointed spiritual successor ( imām) to Ja'far al ...

Shia have their own version of the Imamah doctrine. Originally, Shi'a belief was that they should refrain from politics in the absence of one of the twelve

Shia Imams In Shia Islam, the Imamah ( ar, إمامة) is a doctrine which asserts that certain individuals from the lineage of the Islamic prophet Muhammad are to be accepted as leaders and guides of the ummah after the death of Muhammad. Imamah further ...

. But after The Occultation of the twelfth Shia Imam, the original Shia concept of leadership became untenable, so the notion of Guardianship of the Islamic Jurists ( Velayat-e faqih) was derived by

Ruhollah Khomeini Ruhollah Khomeini, Ayatollah Khomeini, Imam Khomeini ( , ; ; 17 May 1900 – 3 June 1989) was an Iranian political and religious leader who served as the first supreme leader of Iran from 1979 until his death in 1989. He was the founder of ...

See also