- Arabic:
- Ithnā ʿAshariyyah
- Also called:
- Imāmīs, Imāmiyyah, Jaʿfarīs, or Jaʿfariyyah
Twelver Shiʿah
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What is the Twelver Shiʿah sect in Islam?
The Twelver Shi\u02bfah is the largest of the three Shi\u02bfi groups today. They believe that after Prophet Muhammad's death in 632 CE, the spiritual-political leadership should have passed to Ali, the Prophet’s cousin and son-in-law, and then to other imams down to the 12th, Muhammad ibn al-Hasan, who is believed to be in occultation.
The Hidden Imam is expected to return as the Rightly Guided One to start the events of the last days and the Day of Judgement. The Twelver Shi\u02bfah seek guidance from the statements and actions attributed to the imams, the Qurʾān, and the Prophet's Hadith.
Twelver Shi\u02bfism has been the established faith in Iran since 1501 and forms the basis of Iran’s present-day Islamic Republic, which came into being in 1979.
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How is Twelver Shiʿah different from other groups in Islam?
Twelver Shiʿism, the largest of the three Shiʿi groups, differs from other Islamic groups in its belief regarding the succession of spiritual-political leadership following the death of the Prophet Muhammad.
Twelvers believe the imamate was ordained to pass to ʿAlī, the Prophet’s cousin and son-in-law, and then to other imams down to the 12th, Muhammad ibn al-Hasan, who is believed to be in occultation and will return as the Rightly Guided One.
Unlike Sunni Islam, which recognizes the consensus of the community as a source of decision-making, Twelver Shiʿism emphasizes the importance of the divinely designated imams as the source of true knowledge.
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Why are they called 'Twelver' Shiʿah?
The largest Shiʿi group, the Twelver Shiʿah, gets its name from its adherence to a lineage of twelve Imams, who they believe are the spiritual-political successors to the Prophet Muhammad. They believe that the line of Imams began with ʿAlī ibn Abī Ṭālib and continued through his descendants, ending with the twelfth Imam, Muhammad ibn al-Hasan. This Imam is believed to have gone into hiding, or occultation, but will return at the end of times as the Mahdi. Because of their belief in twelve Imams, they are called the Twelvers.
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Who are the Twelve Imams in Twelver Shiʿah belief?
The Twelver Shi'ah is the largest branch of Shi'i Islam. Twelvers believe that there were twelve Imams (leaders) who were the spiritual and political successors to the Prophet Muhammad.
The Imams, in Twelver belief, are ʿAlī, Ḥasan, Ḥusayn, ʿAlī Zayn al-ʿĀbidīn, Muḥammad al-Bāqir, Jaʿfar al-Ṣādiq, Mūsā al-Kāẓim, ʿAlī al-Riḍā, Muḥammad al-Jawād, ʿAlī al-Hādī, Ḥasan al-ʿAskarī, and Muḥammad al-Mahdī.
The 12th Imam, Muhammad al-Mahdi, is believed to have gone into occultation (ghaybah) around 874 CE and will reappear at the Day of Judgement to bring justice to the world.
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What is the importance of the twelfth Imam in Twelver Shiʿah?
In Twelver Shi'ism, the twelfth Imam, Muhammad ibn al-Hasan, also known as the "Hidden Imam," holds immense importance. Twelvers believe that the spiritual-political leadership of the Muslim community was ordained to pass to Ali, the Prophet Muhammad's cousin and son-in-law, and then to other Imams down to the 12th.
Born circa 870, he went into occultation (ghaybah, meaning "concealment by God") soon after his father’s death. The Hidden Imam is believed to be still alive and will reappear when God determines it to be appropriate and safe. As the Rightly Guided One (mahdi), his return will inaugurate the last days and the Day of Judgment; Jesus will also return as part of that process.
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Where is Twelver Shiʿah Islam mainly practiced today and how does it influence local cultures?
Today, Twelver Shi'ah, the largest of the Shi'i groups, is mainly practiced in Iran, where it is the established state religion. It is also the majority Muslim population in Iraq and Bahrain and a significant minority in Lebanon, Kuwait, and Saudi Arabia. Pockets of Twelver Shi'ah communities exist in Afghanistan, Pakistan, India, eastern Africa, Nigeria, Southeast Asia, Europe, and North America.
The faith significantly influences local cultures through its scholarship centers in Iran and Iraq, which attract religious scholars. Twelvers seek guidance from the Qurʾān and hadith, as well as the statements and actions attributed to the imams. The concept of the guardianship of the jurist, advocating for the political leadership of religious scholars, impacts the constitutional arrangements of the Islamic Republic of Iran, although it is not universally accepted among Twelver scholars.
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Twelver Shiʿah, the largest of the three Shiʿi groups extant today.
The Twelvers believe that, at the death of the Prophet Muhammad in 632 ce, the spiritual-political leadership (the imamate) of the Muslim community was ordained to pass down to ʿAlī, the Prophet’s cousin and son-in-law, and then to ʿAlī’s son Ḥusayn and thence to other imams down to the 12th, Muḥammad ibn al-Ḥasan, who is understood to have been born circa 870 but to have gone into occultation (Arabic ghaybah; Persian ghaybat)—a state of concealment by God—soon after his father’s death circa 874. The “Hidden Imam,” as he is sometimes called, is considered to be still alive and will return when God determines it to be appropriate and safe. As the Rightly Guided One (mahdī), upon his return he will inaugurate the processes associated with the last days and the Day of Judgment in particular; as part of that process, Jesus also will return. Other titles associated with him include the Awaited One (al-Muntaẓar); the Imam, or Lord, of the Age (Imām al-Zamān or Ṣāḥib al-Zamān); the Lord of Authority (Ṣāḥib al-Amr); the One Who Arises (al-Qāʾim); and, in reference to the presence of God, the Proof (al-Ḥujjah).
During their years in the community, the imams faced harassment and persecution at the hands of the ʿAbbāsid caliphs, who feared that the imams would organize risings against their rule. Following the 12th imam’s occultation, the Twelver Shiʿah enjoyed a measure of tolerance during the Būyid period (945–1055) in what is now Iran and in Baghdad. There were also pockets of the community scattered across a region extending from what is now Lebanon to Khorāsān (what is now northeastern Iran and parts of Turkmenistan and Afghanistan) and in the Persian Gulf region. At the fall of Baghdad to the Sunni Seljuqs in 1055, the Baghdad community scattered to these other centres. From the years following the 1258 Mongol conquest of Baghdad (the ʿAbbāsid capital from the 8th century) through the Il-Khanid period in Iran (1256–1335), Twelver Shiʿi scholars enjoyed some favour at court, but the bulk of the community remained scattered across the region.
Only in Iran did the faith finally find a home. There, except for a brief hiatus in the mid-18th century, Twelver Shiʿism has been the established faith since 1501, when Ismāʿīl I, the first Ṣafavid shah, captured Tabrīz and declared Twelver Shiʿism to be the official religion of his new realm.
The faith forms the basis of Iran’s present-day Islamic Republic, which came into being in 1979. Up to 95 percent of today’s more than 80 million Iranians are professing Twelvers. Iranian Shiʿah represent perhaps 40 percent or less of the world’s Twelver Shiʿi population, however. The Shiʿah are the majority population in Iraq and Bahrain and form important minorities in Lebanon, Kuwait, and Saudi Arabia. There are also Shiʿah in Egypt and Israel. Other non-Arab countries in which Shiʿah are present are Afghanistan, Pakistan, and India, and there are also Shiʿah in eastern Africa, Nigeria, Southeast Asia (Malaysia, Thailand, Indonesia, and Singapore), Europe, and North America. The faith’s most influential centres of scholarship are located in Iran and Iraq and are associated with the tombs of key Shiʿi figures. In Iran these centres include the cities of Mashhad and Qom, the locations of the tombs of the eighth imam, ʿAlī al-Riḍā, and his sister Fāṭimah, respectively. In Iraq there are centres in Al-Najaf, where the first imam, ʿAlī, is buried, and Karbalāʾ, the site of the battle of the same name (see Battle of Karbalāʾ) and the burial place of ʿAlī’s son al-Ḥusayn, who was killed in that battle.
Until the anticipated return of the imam, on matters of both doctrine and practice, Twelvers seek guidance from the statements and actions attributed to the imams (Hadith), in addition to the Qurʾān and the Hadith of the Prophet. Over the centuries, the Twelver community witnessed the evolution of the institution of the mujtahid, the highly trained scholar, understood to be the representative (Arabic nāʾib, “deputy”) of the Hidden Imam in matters of doctrine and practice. The mujtahid, sometimes also referred to as the faqīh, was to examine the revealed texts, to search for consensus (ijmāʿ) among earlier scholars, and to utilize his own reasoning to offer rulings (fatāwi, singular fatwā; also aḥkām, singular ḥukm). The latter process is referred to as ijtihād, from the Arabic root j-h-d, meaning “strive” or “struggle,” from which is also derived the term jihād. Although the institution is mainly male, there are women mujtahids.
In the 19th century the Twelver clergy underwent further hierarchicization with the institutionalization of the marjaʿ al-taqlīd (source of emulation), the most senior cleric. For some years thereafter there was but one such figure. Today there are 20 or more such individuals (marājiʿ), including some non-Iranians and non-Arabs. Lay followers (muqallidūn, singular muqallid) are enjoined to follow the teachings and rulings of a mujtahid, albeit one of their own choice.
There is no institutional equivalent of the pope in Twelver Shiʿism, and disagreement within the ranks of the Twelver scholars is not uncommon. For example, the concept of “the guardianship of the jurist” (Arabic wilāyat al-faqīh; Persian velāyat-e faqīh), which advocates the political leadership of the religious scholars (ʿulamāʾ) in the constitutional arrangements of the Islamic Republic of Iran, is not accepted by all Twelver scholars, let alone by all the faith’s marājiʿ.

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