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.Dirk Bezemer, Jutta Bolt, Robert Lensink, "Slavery, Statehood and Economic Development in Sub-Saharan Africa", AFRICAN ECONOMIC HISTORY WORKING PAPER SERIES, No. 6/2012, p. 6 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.
Forms Different forms of slavery and servitude existed throughout African history and were shaped by indigenous practices of slavery as well as the Roman institution of slavery (and the later Christian views on slavery), the Islamic institutions of slavery via the Muslim slave trade, and eventually the Atlantic slave trade. Slavery was part of the economic structure of African societies for many centuries, although the extent varied. Ibn Battuta, who visited the ancient kingdom of Mali in the mid-14th century recounts that the local inhabitants competed with each other in the number of slaves and servants they had and was himself given a slave boy as a "hospitality gift."Noel King (ed.), Ibn Battuta in Black Africa, Princeton 2005, p. 54. In sub-Saharan Africa, the slave relationships were often complex, with rights and freedoms denied individuals held in slavery and restrictions on sale and treatment by their masters. Many communities had hierarchies between different types of slaves: for example, differentiating between those who had been born into slavery and those who had been captured through war.
The forms of slavery in Africa were closely related to kinship structures. In many African communities, where land could not be owned, enslavement of individuals was used as a means to increase the influence a person had and expand connections. This made slaves a permanent part of a master's lineage and the children of slaves could become closely connected with the larger family ties. Children of slaves born into families could be integrated into the master's kinship group and rise to prominent positions within society, even to the level of chief in some instances. However, stigma often remained and there could be strict separations between slave members of a kinship group and those related to the master.
Chattel slavery Chattel slavery is a specific servitude relationship where the slave is treated as the property of the owner. As such, the owner is free to sell, trade, or treat the slave as he would other pieces of property, and the children of the slave often are retained as the property of the master. There is evidence of long histories of chattel slavery in the Nile River valley, much of the Sahel and North Africa. Evidence is incomplete about the extent and practices of chattel slavery throughout much of the rest of the continent prior to written records by Arab or European traders.
Domestic service Many slave relationships in Africa revolved around domestic slavery. Slaves would work primarily in the house of the master but retain some freedoms. Domestic slaves could be considered part of the master's household and would not be sold to others without extreme cause. The slaves could own the profits from their labour (whether in land or in products) and could marry and pass the land on to their children in many cases.
Pawnship Pawnship, or debt bondage slavery, involves the use of people as collateral to secure the repayment of debt. Slave labour is performed by the debtor or a relative of the debtor (usually a child). Pawnship was a common form of collateral in West Africa. It involved the pledge of a person or a member of that person's family, to serve another person providing credit. Pawnship was related to, yet distinct from, slavery in most conceptualizations, because the arrangement could include limited specific terms of service to be provided, and because kinship ties would protect the person from being sold into slavery. Pawnship was a common practice throughout West Africa prior to European contact, including among the Akan people, the Ewe people, the Ga people, the Yoruba people, and the Edo people (in modified forms, it also existed among the Efik people, the Igbo people, the Ijaw people, and the Fon people).
Military slavery
Military slavery involved the acquisition and training of conscripted military units which would retain the identity of military slaves even after their service. Slave soldier groups would be run by a Patron, who could be the head of a government or an independent warlord, and who would send his troops out for money and his own political interests.
This was most significant in the Nile valley (primarily in Sudan and Uganda), with slave military units organized by various Islamic authorities, and with the war chiefs of Western Africa. The military units in Sudan were formed in the 1800s through large-scale military raiding in the area which is currently the countries of Sudan and South Sudan.
Slaves for sacrifice Human sacrifice was common in West African states and during the 19th century. Although archaeological evidence is not clear on the issue prior to European contact, in those societies that practised human sacrifice, slaves became the most prominent victims.
The Annual Customs of Dahomey were the most notorious example of human sacrifice of slaves, where 500 prisoners would be sacrificed. Sacrifices were carried out all along the West African coast and further inland. Sacrifices were common in the Benin Empire, in what is now southern Nigeria, and in several small independent states in the same region. In the Ashanti Region, human sacrifice was often combined with capital punishment.R. Rummel (1997)"Death by government". Transaction Publishers. p.63.
Local slave trade
Many nations such as the Bono State, Ashanti of present-day Ghana and the Yoruba of present-day Nigeria were involved in slave-trading. Groups such as the Imbangala of Angola and the Nyamwezi of Tanzania would serve as intermediaries or roving bands, waging war on African states to capture people for export as slaves. Historians John Thornton and Linda Heywood of Boston University have estimated that of the Africans captured and then sold as slaves to the New World in the Atlantic slave trade, around 90% were enslaved by fellow Africans who sold them to European traders. Henry Louis Gates, the Harvard Chair of African and African American Studies, has stated that "without complex business partnerships between African elites and European traders and commercial agents, the slave trade to the New World would have been impossible, at least on the scale it occurred."
The entire Bubi ethnic group descends from escaped intertribal slaves owned by various ancient West-central African ethnic groups.
Practices by region
Like most other regions of the world, slavery and forced labour existed in many kingdoms and societies of Africa for hundreds of years. Ugo Kwokeji has called early European reports of slavery throughout Africa in the 1600s unreliable, saying they conflated various forms of servitude with chattel slavery.
The best evidence of slave practices in Africa comes from the major kingdoms, particularly along the coast, and there is little evidence of widespread slavery practices in stateless societies. Slave trading was mostly secondary to other trade relationships; however, there is evidence of a trans-Saharan slave trade route from Roman times which persisted in the area after the fall of the Roman Empire. However, kinship structures and rights provided to slaves (except those captured in war) appears to have limited the scope of slave trading before the start of the trans-Saharan slave trade, Indian Ocean slave trade and the Atlantic slave trade.
North Africa
Slavery in northern Africa dates back to ancient Egypt. The New Kingdom (1558–1080 BC) brought large numbers of slaves as prisoners of war up the Nile valley and used them for domestic and supervised labour. Ptolemaic Egypt (305 BC–30 BC) used both land and sea routes to bring in slaves.
Chattel slavery was legal and widespread throughout North Africa, be it under Ancient Carthage (ca. 814 BC – 146 BC), or later when the region was controlled by the Roman Empire (145 BC – ca. 430 AD) and the Eastern Romans (533 to 695 AD). A slave trade bringing Saharans through the desert to North Africa, which existed in Roman times, continued and documentary evidence in the Nile Valley shows it to have been regulated there by treaty. As the Roman Republic expanded, it enslaved defeated enemies and Roman conquests in Africa were no exception. For example, Orosius records that Rome enslaved 27,000 people from North Africa in 256 BC. Piracy became an important source of slaves for the Roman Empire and in the 5th century AD pirates would raid coastal North African villages and enslave those captured.
Chattel slavery persisted after the fall of the Roman Empire in the largely Christian communities of the region. After the Islamic trade expansion across the Sahara, the practices continued and eventually, the assimilative form of slavery spread to major societies on the southern end of the Sahara (such as Mali, Songhai, and Ghana). The medieval slave trade in Europe was mainly to the East and South: the Christian Byzantine Empire and the Muslim World were the destinations, and Central and Eastern Europe an important source of slaves.
The Mamluks were slave soldiers who converted to Islam and served the Muslim caliphs and the Ayyubid Sultans during the Middle Ages. The first Mamluks served the Abbasid caliphs in 9th century Baghdad. Over time, they became a powerful military caste, and on more than one occasion they seized power for themselves, for example, ruling Egypt from 1250 to 1517. From 1250 on Egypt was ruled by the Bahri dynasty of Kipchak Turk origin.
According to Robert Davis, between 1 million and 1.25 million Europeans were captured by Barbary pirates and sold as slaves to North Africa and the Ottoman Empire between the 16th and 19th centuries. However, to extrapolate his numbers, Davis assumes the number of European slaves captured by Barbary pirates were constant for a 250-year period, stating:
Davis' numbers have been disputed by other historians, such as David Earle, who cautions that the true picture of European slaves is clouded by the fact the corsairs also seized non-Christian whites from eastern Europe and black people from West Africa. Middle East expert John Wright cautions that modern estimates are based on back-calculations from human observation, which may lead to distortions.