The term caliphate, "dominion of a caliph ('successor')" (from the Arabic خلافة or khilāfa, Turkish: Hilafet), refers to the first system of government established in Islam and represented the leaders unity of the Muslim Ummah (community)^{[clarification needed]}. In theory, it is an aristocratic–constitutional republic (the Constitution being the Constitution of Medina), which means that the head of state, the Caliph, and other officials are representatives of the people and of Islam and must govern according to constitutional and religious law, or Sharia. In its early days, it resembled elements of direct democracy (see shura) and an elective monarchy.

It was initially led by Muhammad's disciples as a continuation of the leaders and religious system the prophet established, known as the 'Rashidun caliphates'. A "caliphate" is also a state which implements such a governmental system.

Sunni Islam stipulates that the head of state, the caliph, should be selected by Shura – elected by Muslims or their representatives. Followers of Shia Islam believe the caliph should be an imam chosen by God from the Ahl al-Bayt (Muhammad's purified progeny). After the Rashidun period until 1924, caliphates, sometimes two at a single time, real and illusory, were ruled by dynasties. The first dynasty was the Umayyad. This was followed by the Abbasid, the Fatimid (not recognized by others outside Fatimid domain), and finally the Ottoman Dynasty.

Dr Adhyaksa Dault (born June 7, 1963 in Donggala Regency, Central Sulawesi) is the State Minister for Youth and Sport Affairs on United Indonesia Cabinet (2004–2009). Before that, he was the head of the National Youth Association (KNPI). He is a supporter of the Indonesian 2022 FIFA World Cup bid.

He married with Drg. Mirah Amiriah, the second daughter of Prof Dr. Artono Aris Munandar, Ex head of Electric and New energy, Mining and Energy Department.

Abdullah al-Mahdi Billah (r. 909-934) (Arabic: عبد الله بن الحسين بن أحمد بن عبد الله بن محمد بن اسماعيل بن جعفر المهدي‎), often referred to as Ubayd Allah, is the founder of the Fatimid dynasty, the only major Shi'a caliphate in Islam, and established Fatimid rule throughout much of North Africa.

At the beginning of the Abbasid realm in Baghdad, the Alids faced severe persecution by the ruling party as they were a direct threat to the Abbasid Caliphate. Owing to the political complexities, the forefathers of Imam Abdullah opted to conceal themselves which helped them secure the Dawa's existence. Subsequently, these Imams traveled long and far towards the Iranian Plateau and distanced themselves from the epicenter of the political scenario. Al Mahdi's father, Imam al Husain al Mastoor returned in secrecy to Syria and began to control the Dawa's affairs from there in complete concealment. He sent two Dai's of great calibre, abul Qasim and Abu 'Abdullah Al-Husayn Al-Shi'i to Yemen and Western Africa respectively to build the foundation for what was to be the Fatimid Caliphate.