Ummah in the context of "Abbasid Caliphate"

A caliphate (Arabic: خلافة, romanized: khilāfa [xiˈlaːfa]) is an institution or public office under the leadership of an Islamic steward with the title of caliph (/ˈkælɪf, ˈkeɪ-/; خليفة khalīfa [xaˈliːfa], pronunciation), a person considered a political–religious successor to the Islamic prophet Muhammad and a leader of the entire Muslim world (ummah). Historically, the caliphates were polities based on Islam which developed into multi-ethnic trans-national empires.

During the medieval period, three major caliphates succeeded each other: the Rashidun Caliphate (632–661), the Umayyad Caliphate (661–750), and the Abbasid Caliphate (750–1517). In the fourth major caliphate, the Ottoman Caliphate, the rulers of the Ottoman Empire claimed caliphal authority from 1517 until the Ottoman Caliphate was formally abolished as part of the 1924 secularisation of Turkey. The Sharif of Mecca then claimed the title, but this caliphate fell quickly after its conquest by the Sultanate of Nejd (the predecessor of modern-day Saudi Arabia), leaving the claim in dormancy. Throughout the history of Islam, a few other Muslim states, almost all of which were hereditary monarchies, have claimed to be caliphates.

The Hijri calendar (Arabic: ٱلتَّقْوِيم ٱلْهِجْرِيّ, romanized: al-taqwīm al-hijrī), also known in English as the Islamic calendar, is a lunar calendar consisting of 12 lunar months in a year of 354 or 355 days. It is used to determine the proper days of Islamic holidays and rituals, such as the annual fasting and the annual season for the great pilgrimage. In almost all countries where the predominant religion is Islam, the civil calendar is the Gregorian calendar, with Syriac month-names used in the Levant and Mesopotamia (Iraq, Syria, Jordan, Lebanon and Palestine), but the religious calendar is the Hijri one.

This calendar enumerates the Hijri era, whose epoch was established as the Islamic New Year in 622 CE. During that year, Muhammad and his followers migrated from Mecca to Medina and established the first Muslim community (ummah), an event commemorated as the Hijrah. In the West, dates in this era are usually denoted AH (Latin: Anno Hegirae, lit. 'In the year of the Hijrah'). In Muslim countries, it is also sometimes denoted as H from its Arabic form (سَنَة هِجْرِيَّة, abbreviated ھ). In English, years prior to the Hijra are denoted as BH ("Before the Hijra").

The terms Islamic world and Muslim world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs, politics, and laws of Islam or to societies in which Islam is practiced. In a modern geopolitical sense, these terms refer to countries in which Islam is widespread, although there are no agreed criteria for inclusion. The term Muslim-majority countries is an alternative often used for the latter sense.

The history of the Muslim world spans about 1,400 years and includes a variety of socio-political developments, as well as advances in the arts, science, medicine, philosophy, law, economics and technology during the Islamic Golden Age. Muslims look for guidance to the Quran and believe in the prophetic mission of the Islamic prophet Muhammad, but disagreements on other matters have led to the appearance of different religious schools of thought and sects within Islam. The Islamic conquests, which culminated in the Caliphate being established across three continents (Asia, Africa, and Europe), enriched the Muslim world, achieving the economic preconditions for the emergence of this institution owing to the emphasis attached to Islamic teachings. In the modern era, most of the Muslim world came under European colonial domination. The nation states that emerged in the post-colonial era have adopted a variety of political and economic models, and they have been affected by secular as well as religious trends.

Twelver Shi'ism (Arabic: اِثْنَا عَشَرِيَّة, romanized: Ithnā ʿAshariyya) is the largest branch of Shia Islam, comprising about 85% of all Shia Muslims. The term Twelver refers to its adherents' belief in the twelve successors, referred to as Twelve Imams, and their belief that the last Imam, Muhammad al-Mahdi, lives in occultation (ghayba) and will reappear as "the awaited Mahdi" (al-Mahdi al-muntazar) alongside Isa al-Masih (Jesus Christ), son of Bibi Mariam (The Virgin Mary), in order to restore justice and peace.

Twelver Shi'as believe that the Twelve Imams are divinely appointed as both spiritual and political successors to the Islamic prophet Muhammad, and that they possess special knowledge and authority to guide the Muslim community. According to Twelver theology, the Twelve Imams are exemplary human individuals who rule over the Muslim community (Ummah) with justice, and are able to preserve and interpret the Islamic law (Sharia) and the esoteric meaning of the Qur'an. The words and deeds (sunnah) of Muhammad and the Imams are a guide and model for the Muslim community to follow. As a result, Muhammad and the Imams must be free from error and sin, a doctrine known as Ismah (literally 'protection') or infallibility, and must be chosen by divine decree, or nass, through Muhammad.

The Rashidun (Arabic: الراشدون, romanized: al-Rāshidūn, lit. 'the rightly-guided') are the first four caliphs (lit. 'successors') who led the Muslim community following the death of Muhammad: Abu Bakr (r. 632–634), Umar (r. 634–644), Uthman (r. 644–656), and Ali (r. 656–661).

The reign of these caliphs, called the Rashidun Caliphate (632–661), is considered in Sunni Islam to have been 'rightly guided' (Arabic: rāshid), meaning that it constitutes a model (Sunnah) to be followed and emulated from a religious point of view.

Maslaha or maslahah or maslahat (Arabic: مصلحة, lit. 'benefit, public interest') or maslaha mursala (Arabic: مصالح مرسلة, lit. '"sent", "transmitted", "unbonded", "open" or "unconditional" public interest'), comes from the term "Salihat" (good deeds, also linked to Islah and Istislah), is a concept in Sharia (Islamic divine law) regarded as a basis of law. It forms a part of extended methodological principles of Islamic jurisprudence (uṣūl al-fiqh) and denotes prohibition or permission of something, according to necessity and particular circumstances, on the basis of whether it serves the public interest of the Muslim community (ummah). In principle, maslaha is invoked particularly for issues that are not regulated by the Qur'an, the sunnah (the teachings and practices of the Islamic prophet Muhammad), or qiyas (analogy). The concept is acknowledged and employed to varying degrees depending on the jurists and schools of Islamic jurisprudence (madhhab). The application of the concept has become more important in modern times because of its increasing relevance to contemporary legal issues. The opposite term of maslaha is mafsada (مفسدة, harm). Islamic politics is itself predicated on maslaha, and is such changeable, as it must respond to the exigencies of time. The term is different from bidah.

The first Islamic state was established by the Islamic prophet Muhammad in Medina in 622 under the Constitution of Medina. It represented the political unity of the Muslim Ummah (nation). After Muhammad's death, his companions known as the Rightly Guided Caliphs (Rashidun) founded the Rashidun Caliphate (632–661), which began massive expansion and motivated subsequent Islamic states, such as the Umayyad Caliphate (661–750) and Abbasid Caliphate (750–1258).

Muhammad came to the city of Medina following the migration of his followers in what is known as the Hijrah (migration to Medina) in 622. He had been invited to Medina by city leaders to adjudicate disputes between clans from which the city suffered, and was received positively by the city's Jewish and pagan residents as an arbitrator. As a result, he was accepted by popular consensus as the city's political leader, establishing the first Islamic state with his role.