Africa

Slavery has historically been widespread in Africa. Systems of servitude and slavery were once commonplace in parts of Africa, as they were in much of the rest of the ancient and medieval world. When the trans-Saharan slave trade, Red Sea slave trade, Indian Ocean slave trade and Atlantic slave trade (which started in the 16th century) began, many of the pre-existing local African slave systems began supplying captives for slave markets outside Africa. Slavery in contemporary Africa still exists in some regions despite being illegal.

In the relevant literature, African slavery is categorized into indigenous slavery and export slavery, depending on whether or not slaves were traded beyond the continent. Slavery in historical Africa was practiced in many different forms: Debt slavery, enslavement of war captives, military slavery, slavery for prostitution and enslavement of criminals were all practiced in various parts of Africa. Slavery for domestic and court purposes was widespread throughout Africa. Plantation slavery also occurred, primarily on the eastern coast of Africa and in parts of West Africa. The importance of domestic plantation slavery increased during the 19th century. Due to the abolition of the Atlantic slave trade, many African states that were dependent on the international slave trade reoriented their economies towards legitimate commerce worked by slave labour.

Homo (from Latin homō 'human') is a genus of great ape (family Hominidae) that emerged from the early homininian genus Australopithecus, encompassing a single extant species, Homo sapiens (modern humans), along with a number of extinct species (e.g. Homo erectus and Homo neanderthalensis) classified as either ancestral or closely related to modern humans, collectively called archaic humans. Homo, together with the genus Paranthropus, is probably most closely related to the species Australopithecus africanus within Australopithecus. The closest living relatives of Homo are of the hominin genus Pan (chimpanzees and bonobos), with the ancestors of Pan and Homo estimated to have diverged around 5.7–11 million years ago during the Late Miocene.

The oldest member of the genus is Homo habilis, with fossil records of just over 2 million years ago. H. erectus appeared about 2 million years ago and spread throughout Africa (debatably as another species called Homo ergaster) and Eurasia in several migrations. The species was adaptive and successful, and persisted for more than a million years before gradually diverging into new species around 500,000 years ago.

The Afroasiatic languages (also known as Afro-Asiatic, Afrasian, Hamito-Semitic, or Semito-Hamitic) are a language family (or "phylum") of about 400 languages spoken predominantly in West Asia, North Africa, the Horn of Africa, and parts of the Sahara and Sahel. Over 500 million people are native speakers of an Afroasiatic language, constituting the fourth-largest language family after Indo-European, Sino-Tibetan, and Niger–Congo. Most linguists divide the family into six branches: Berber (Amazigh), Chadic, Cushitic, Egyptian, Omotic, and Semitic. The vast majority of Afroasiatic languages are considered indigenous to the African continent, including all those not belonging to the Semitic branch (which originated in West Asia).

The five most spoken languages in the family are: Arabic (of all varieties), which is by far the most widely spoken within the family, with around 411 million native speakers concentrated primarily in West Asia and North Africa; the Chadic Hausa language, with over 58 million speakers in West Africa; the Cushitic Oromo language, with 45 million native speakers; the Semitic Amharic language, with 35 million; and the Cushitic Somali language with 24 million, all the latter three in the Horn of Africa. Other Afroasiatic languages with millions of native speakers include the Semitic Tigrinya, Tigre and Modern Hebrew, the Cushitic Beja, Sidama and Afar languages, the Berber languages (Shilha, Kabyle, Central Atlas Tamazight, Shawiya and Tarifit), and the Omotic Wolaitta language. Most languages of the non-Semitic branches (especially Chadic and Omotic) have far fewer speakers, and many Afroasiatic languages in Africa are vulnerable or endangered.

The Arab migrations to the Maghreb involved successive waves of migration and settlement by Arab people in the Maghreb region of Africa, encompassing modern-day Algeria, Libya, Morocco and Tunisia. The process took place over several centuries, lasting from the early 7th century to the 17th century. The Arab migrants hailed from the Middle East, particularly the Arabian Peninsula, with later groups arriving from the Levant and Iraq.

The influx of Arabs to the Maghreb began in the 7th century with the Arab conquest of the Maghreb, when Arab armies conquered the region as part of the early Muslim conquests. This initial wave of Arab migration was followed by subsequent periods of migration and settlement, notably during the Umayyad and Abbasid caliphates and later Arab dynasties. However, the most significant wave of Arab migration occurred in the 11th century with the arrival of more Bedouin tribes from the Arabian Peninsula, such as Banu Hilal, Banu Sulaym, and Maqil. The last significant wave of Arab migration to the Maghreb was from Al-Andalus in the 17th century as a result of the Reconquista. These migrants established numerous Arab empires and dynasties in the Maghreb, such as the Aghlabids, Idrisids, Sulaymanids, Salihids, Fatimids, Saadians and 'Alawites.

African immigration to Israel is the international movement to Israel from Africa of people who are not natives or do not possess Israeli citizenship in order to settle or reside there. This phenomenon began in the second half of the 2000s, when a large number of people from Africa entered Israel, mainly through the then-lightly fenced border between Israel and Egypt in the Sinai Peninsula. According to the data of the Israeli Interior Ministry, 26,635 people arrived illegally in this way by July 2010, and over 55,000 by January 2012. In an attempt to curb the influx, Israel constructed the Egypt–Israel barrier. Since its completion in December 2013, the barrier has almost completely stopped the immigration of Africans into Israel across the Sinai border.

The African refugee population in Israel is composed primarily of Sudanese and Eritrean refugees migrating to Israel through the Sinai Desert. Israeli policy concerning these refugees has evolved from a policy of neutrality to a policy of deterrence. These refugees began arriving in Israel in the 21st century, led by Bedouin smugglers. As of 2018, the non-Jewish African refugee population in Israel is approximately 36,000.

The history of Saudi Arabia as a nation state began with the emergence of the Al Saud dynasty in central Arabia in 1727 and the subsequent establishment of the Emirate of Diriyah. Pre-Islamic Arabia, the territory that constitutes modern Saudi Arabia, was the site of several ancient cultures and civilizations; the prehistory of Saudi Arabia shows some of the earliest traces of human activity in the world.

The world's second-largest religion, Islam, emerged in what is now Saudi Arabia. In the early 7th century, the Islamic prophet Muhammad united the population of Arabia and created a single Islamic religious polity. Following his death in 632, his followers rapidly expanded the territory under Muslim rule beyond Arabia, conquering huge and unprecedented swathes of territory (from the Iberian Peninsula in the west to modern-day Pakistan in the east) in a matter of decades. Arab dynasties originating from modern-day Saudi Arabia founded the Rashidun (632–661), Umayyad (661–750), Abbasid (750–1517), and Fatimid (909–1171) caliphates, as well as numerous other dynasties in Asia, Africa, and Europe.

Islam in Africa is the continent's second most widely professed faith behind Christianity. Africa was the first continent into which Islam spread from the Middle East, during the early 7th century CE. Almost one-third of the world's Muslim population resides in Africa. Muslims crossed current Djibouti and Somalia to seek refuge in present-day Eritrea and Ethiopia during the Hijrah ("Migration") to the Christian Kingdom of Aksum. Like the vast majority (90%) of Muslims in the world, most Muslims in Africa are also Sunni Muslims; the complexity of Islam in Africa is revealed in the various schools of thought, traditions, and voices in many African countries. Many African ethnicities, mostly in the northern half of the continent, consider Islam as their traditional religion. The practice of Islam on the continent is not static and is constantly being reshaped by prevalent social, economic, and political conditions. Generally Islam in Africa often adapted to African cultural contexts and belief systems forming Africa's own orthodoxies.

In 2014, it was estimated that Muslims constituted nearly half of the population of Africa (over 49%) with a total population of around 437 million and accounting for over a quarter (about 27%) of the global Muslim population. Islam is the main religion of North Africa, the Horn of Africa, Sahel, the Swahili Coast, and West Africa, with minority immigrant populations in South Africa.

Chattel slavery was a major institution and a significant part of the Ottoman Empire's economy and traditional society.

The main sources of slaves were wars and politically organized enslavement expeditions in the Caucasus, Eastern Europe, Southern Europe, Central Europe, Southeast Europe, the Western Mediterranean and Africa. It has been reported that the selling price of slaves decreased after large military operations.

The meridian 16° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Europe, Africa, the Atlantic Ocean, the Southern Ocean, and Antarctica to the South Pole.

The 16th meridian east forms a great circle with the 164th meridian west.

The meridian 25° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Europe, Africa, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole.

The 25th meridian east forms a great circle with the 155th meridian west.