Shia Islam

Shia Islam (/ˈʃiːə/) is the second-largest branch of Islam. It holds that the Islamic prophet Muhammad designated Ali ibn Abi Talib (r. 656 – 661 CE) as his successor (khalīfa) and the Imam (spiritual and political leader) after him, at the event of Ghadir Khumm, but was prevented from succeeding Muhammad as leader of the Muslims by some of Muhammad's other companions (ṣaḥāba) at Saqifah. This view contrasts with Sunnī Islam, which asserts that Muhammad did not appoint a successor before his death and considers Abū Bakr, who was appointed caliph by a group of senior Muslims at Saqifah, to be the first rightful (rāshidūn) caliph after Muhammad (632–634 CE). Adherents of Shia Islam are called Shia Muslims.

Shia Islam is based on a hadith report concerning Muhammad's pronouncement at Ghadir Khumm. Shia Muslims believe that Ali, Muhammad's cousin and son-in-law, was the designated successor to Muhammad as Islam's spiritual and political leader. This belief later developed into the Imamah, the tradition that certain descendants of Muhammad, the Ahl al-Bayt, are rightful rulers or Imams through the bloodline of Ali and his firstborn son Ḥasan, whom Shia Muslims believe possess special spiritual and political authority over the Muslim community. Later events such as Husayn ibn Ali's martyrdom in the Battle of Karbala (680 CE) further influenced the development of Shia Islam, contributing to its formation as a distinct religious sect with its own rituals and shared collective memory.^[1]

Shia Islam is the second-largest branch of Islam, followed by 10–15% of all Muslims. Although there are many Shia subsects in the Muslim world, Twelver Shīʿīsm is by far the largest and most influential, comprising about 85% of all Shia Muslims. Others include the Isma'ilis, Zaydis, and Alevis. Shia Muslims are a majority of the population in four countries across the Muslim world: Iran, Iraq, Azerbaijan, and Bahrain. Significant Shi’ite communities are also found in Lebanon, Kuwait, Turkey, Yemen, and the Indian subcontinent. Iran, a theocratic Islamic republic governed by a framework established by Ayatollah Khomeini known as the Guardianship of the Islamic Jurist, is the only country where Shia Islam is the foundation of both its laws and governance.^[2]