Haile Selassie in the context of "Rastafari"

The Solomonic dynasty, also known as the House of Solomon, was the ruling dynasty of the Ethiopian Empire from the thirteenth to twentieth centuries. The dynasty was founded by Yekuno Amlak, who overthrew the Zagwe dynasty in 1270. His successors claimed he was descended from the legendary king Menelik I, the supposed son of the biblical King Solomon and the Queen of Sheba, in order to legitimize the dynasty's assumption of power. Although this claimed ancestry gave the dynasty its name, there is no credible evidence that the dynasty was descended from Solomon or the Davidic line. The Solomonic dynasty remained in power until 1974, when its last emperor Haile Selassie was overthrown by a coup d'état.

Until the end of the Ethiopian monarchy in 1974, there were two categories of nobility in Ethiopia and Eritrea. The Mesafint (Ge'ez: መሳፍንት masāfint, modern transcription mesāfint, singular መስፍን masfin, modern mesfin, "prince"), the hereditary royal nobility, formed the upper echelon of the ruling class. The Mekwanint (Ge'ez: መኳንንት makʷanint, modern mekʷanint, singular መኰንን makʷanin, modern mekʷanin or Amharic: መኮንን mekonnen, "officer") were the appointed nobles, often of humble birth, who formed the bulk of the aristocracy. Until the 20th century, the most powerful people at court were generally members of the Mekwanint appointed by the monarch, while regionally, the Mesafint enjoyed greater influence and power. Emperor Haile Selassie greatly curtailed the power of the Mesafint to the benefit of the Mekwanint, who by then were essentially coterminous with the Ethiopian government.

The Mekwanint were officials who had been granted specific offices in the Abyssinian government or court. Higher ranks from the title of Ras descending through to Balambaras were also bestowed upon members of the Mekwanint. A member of the Mesafint, however, would traditionally be given precedence over a member of the Mekwanint of the same rank. For example, Ras Mengesha Yohannes, son of Emperor Yohannes IV and thus a member of the Mesafint, would have outranked Ras Alula Engida, who was of humble birth and therefore a member of the Mekwanint, even though their ranks were equal.

The Ethiopian Empire, historically known as Abyssinia or simply Ethiopia, was a sovereign state that encompassed the present-day territories of Ethiopia and Eritrea. It existed from the establishment of the Solomonic dynasty by Yekuno Amlak around 1270 until the 1974 coup d'état by the Derg, which ended the reign of the final Emperor, Haile Selassie. In the late 19th century, under Emperor Menelik II, the empire expanded significantly to the south, and in 1952, Eritrea was federated under Selassie's rule. Despite being surrounded by hostile forces throughout much of its history, the empire maintained a kingdom centered on its ancient Christian heritage.

Founded in 1270 by Yekuno Amlak, who claimed to descend from the last Aksumite king and ultimately King Solomon and the Queen of Sheba, it replaced the Agaw kingdom of the Zagwe. While initially a rather small and politically unstable entity, the Empire managed to expand significantly under the crusades of Amda Seyon I (1314–1344) and Dawit I (1382–1413), temporarily becoming the dominant force in the Horn of Africa. The Ethiopian Empire would reach its peak during the long reign of Emperor Zara Yaqob (1434–1468). He consolidated the conquests of his predecessors, built numerous churches and monasteries, encouraged literature and art, centralized imperial authority by substituting regional warlords with administrative officials, and significantly expanded his hegemony over adjacent Islamic territories.

Beginning with the Kingdom of Aksum, Ethiopia's territory evolved significantly through conquest of the lands surrounding it. Strong Aksumite trading partnerships with other world powers gave prominence to its territorial expansion. In 330, Aksum besieged the Nubian city of Meroë, marking the beginning of its great expansion. It finally declined after the rise of Islamic dominion in South Arabia, and it ultimately collapsed in the 10th century.

The Zagwe dynasty emerged and ruled until 1270, when Amhara-Shewan Yekuno Amlak revolted against the last king, Yetbarak, commencing the Solomonic dynasty-led Ethiopian Empire. The empire reached its greatest extent under the emperors Amda Seyon I and Zara Yaqob. In 1896, Emperor Menelik II’s conquest strongly consolidated Ethiopia’s modern borders while eluding the 19th-century Scramble for Africa and Italian colonialism. Eritrea was annexed by the Ethiopian imperial government under Emperor Haile Selassie in 1952, culminating in the Eritrean War of Independence. Eritrea eventually seceded by referendum during its seizure by the Ethiopian People's Revolutionary Democratic Front (EPRDF) in 1993.

On 12 September 1974, Emperor Haile Selassie was deposed by the Coordinating Committee of the Armed Forces, Police, and Territorial Army, a military junta that consequently ruled Ethiopia as the Derg until 28 May 1991.

In February 1974, the Ethiopian Revolution was accompanied by mutinies of units of the Imperial Army, which were ignited over resentment of low payment. The Derg established the Coordinating Council of the Armed Forces in June 1974, and grew rapidly to topple the ministers of Haile Selassie under Prime Minister Endelkachew Makonnen. Upon deposing the emperor, many of his personages and Imperial family members fled to London like Crown Prince Asfaw Wossen. On 27 March 1975, the Derg officially abolished the monarchy and the Ethiopian Empire as a whole, and began implementing a Marxist-Leninist system, along with nationalizing all properties. Haile Selassie died on 27 August, with different sources attributing his death to strangulation by the order of the military government or natural causes during a prostate operation.

Ras Makonnen Wolde Mikael Wolde Melekot (Amharic: ራስ መኮንን ወልደ ሚካኤል ወልደ መለኮት; 8 May 1852 – 21 March 1906), or simply Ras Makonnen, Horse name: Abba Qagnew (አባ ቃኘው), was an Ethiopian royal from Shewa, a military leader, the governor of Harar, and the father of future Emperor Haile Selassie. Described by Nikolai Gumilev as "one of the greatest leaders of Abyssinia", he served in the First Italo-Ethiopian War, playing a key role at the Battle of Adwa.

The Derg or Dergue (Amharic: ደርግ, lit. 'committee' or 'council'), officially the Provisional Military Administrative Council (PMAC), was the military junta that ruled Ethiopia, including present-day Eritrea, from 1974 to 1987, when they formally "civilianized" the administration, though remaining in power until 1991.

The Derg was established on 21 June 1974 as the Coordinating Committee of the Armed Forces, Police and Territorial Army, by junior and mid level officers of the Imperial Ethiopian Army and members of the police. The officers decided everything collectively at first, and selected Mengistu Haile Mariam to chair the proceedings. On 12 September 1974, the Derg overthrew the government of the Ethiopian Empire and Emperor Haile Selassie during nationwide mass protests, and three days later formally renamed itself the Provisional Military Administrative Council. In March 1975 the Derg abolished the monarchy and established Ethiopia as a socialist state under a military-led provisional government. The abolition of feudalism, increased literacy, nationalization, and sweeping land reform including the resettlement and villagization from the Ethiopian Highlands became priorities. Mengistu became chairman in 1977, launching the Red Terror (Qey Shibir) political repression campaign to eliminate political opponents, with tens of thousands imprisoned and executed without trial.

Zara Yaqob (Ge'ez: ዘርዐ ያዕቆብ, Zarʾa Yāʿǝqob; 1399 – 26 August 1468) was Emperor of Ethiopia, and a member of the Solomonic dynasty who ruled under the regnal name Constantine I (Ge’ez: ቈስጠንጢኖስ, Ḳʷasṭanṭinos; Amharic: ቆስጠንጢኖስ, Ḳosṭänṭinos). He is known for the Geʽez literature that flourished during his reign, the handling of both internal Christian affairs and external wars with Muslims, and the founding of Debre Birhan as his capital. He reigned for 34 years and 2 months (r. 1434-1468).

The British historian Edward Ullendorff stated that Zara Yaqob "was unquestionably the greatest ruler Ethiopia had seen since Ezana, during the heyday of Aksumite power, and none of his successors on the throne – excepted only the emperors Menelik II and Haile Selassie – can be compared to him."