Atlantic slave trade.

The Atlantic slave trade or transatlantic slave trade involved the transportation by slave traders of enslaved African people to the Americas. European slave ships regularly used the triangular trade route and its Middle Passage. Europeans established a coastal slave trade in the 15th century and trade to the Americas began in the 16th century, lasting through the 19th century. The vast majority of those who were transported in the transatlantic slave trade were from Central Africa and West Africa and had been sold by West African slave traders to European slave traders, while others had been captured directly by the slave traders in coastal raids. European slave traders gathered and imprisoned the enslaved at forts on the African coast and then brought them to the Americas.

Some Portuguese and Europeans participated in slave raids. As the National Museums Liverpool explains: “European traders captured some Africans in raids along the coast, but bought most of them from local African or African-European dealers.” Many European slave traders generally did not participate in slave raids because life expectancy for Europeans in sub-Saharan Africa was less than one year during the period of the slave trade because of malaria that was endemic in the African continent. Portuguese coastal raiders found that slave raiding was too costly and often ineffective and opted for established commercial relations.

The colonial South Atlantic and Caribbean economies were particularly dependent on slave labour for the production of sugarcane and other commodities. This was viewed as crucial by those Western European states which were vying with one another to create overseas empires.The Portuguese, in the 16th century, were the first to transport slaves across the Atlantic. In 1526, they completed the first transatlantic slave voyage to Brazil, and other Europeans soon followed.

Shipowners regarded the slaves as cargo to be transported to the Americas as quickly and cheaply as possible, there to be sold to work on coffee, tobacco, cocoa, sugar, and cotton plantations, gold and silver mines, rice fields, the construction industry, cutting timber for ships, as skilled labour, and as domestic servants. The first enslaved Africans sent to the English colonies were classified as indentured servants, with legal standing similar to that of contract-based workers coming from Britain and Ireland. However, by the middle of the 17th century, slavery had hardened as a racial caste, with African slaves and their future offspring being legally the property of their owners, as children born to slave mothers were also slaves (partus sequitur ventrem). As property, the people were considered merchandise or units of labour, and were sold at markets with other goods and services.

The major Atlantic slave trading nations, in order of trade volume, were Portugal, Britain, Spain, France, the Netherlands, the United States, and Denmark. Several had established outposts on the African coast, where they purchased slaves from local African leaders. These slaves were managed by a factor, who was established on or near the coast to expedite the shipping of slaves to the New World. Slaves were imprisoned in trading posts known as factories while awaiting shipment. Current estimates are that about 12 million to 12.8 million Africans were shipped across the Atlantic over a span of 400 years.

The number purchased by the traders was considerably higher, as the passage had a high death rate, with between 1.2 and 2.4 million dying during the voyage, and millions more in seasoning camps in the Caribbean after arrival in the New World. Millions of people also died as a result of slave raids, wars, and during transport to the coast for sale to European slave traders. Near the beginning of the 19th century, various governments acted to ban the trade, although illegal smuggling still occurred. It was generally thought that the transatlantic slave trade ended in 1867, but evidence was later found of voyages until 1873. In the early 21st century, several governments issued apologies for the transatlantic slave trade.

Human toll

The transatlantic slave trade resulted in a vast and as yet unknown loss of life for African captives both in and outside the Americas. Estimates have ranged from as low as 2 million to as high 60 million. “More than a million people are thought to have died” during their transport to the New World according to a BBC report. More died soon after their arrival. The number of lives lost in the procurement of slaves remains a mystery but may equal or exceed the number who survived to be enslaved.

The trade led to the destruction of individuals and cultures. Historian Ana Lucia Araujo has noted that the process of enslavement did not end with arrival on Western Hemisphere shores; the different paths taken by the individuals and groups who were victims of the Atlantic slave trade were influenced by different factors—including the disembarking region, the ability to be sold on the market, the kind of work performed, gender, age, religion, and language.

Patrick Manning estimates that about 12 million slaves entered the Atlantic trade between the 16th and 19th centuries, but about 1.5 million died on board ship. About 10.5 million slaves arrived in the Americas. Besides the slaves who died on the Middle Passage, more Africans likely died during the slave raids and wars in Africa and forced marches to ports. Manning estimates that 4 million died inside Africa after capture, and many more died young. Manning’s estimate covers the 12 million who were originally destined for the Atlantic, as well as the 6 million destined for Arabian slave markets and the 8 million destined for African markets. Of the slaves shipped to the Americas, the largest share went to Brazil and the Caribbean.

Canadian scholar Adam Jones characterized the deaths of millions of Africans during the Atlantic slave trade as genocide. He called it “one of the worst holocausts in human history”, and claims arguments to the contrary such as “it was in slave owners’ interest to keep slaves alive, not exterminate them” to be “mostly sophistry” stating: “the killing and destruction were intentional, whatever the incentives to preserve survivors of the Atlantic passage for labour exploitation. To revisit the issue of intent already touched on: If an institution is deliberately maintained and expanded by discernible agents, though all are aware of the hecatombs of casualties it is inflicting on a definable human group, then why should this not qualify as genocide?”

Saidiya Hartman has argued that the deaths of enslaved people was incidental to the acquisition of profit and to the rise of capitalism: “Death wasn’t a goal of its own but just a by-product of commerce, which has the lasting effect of making negligible all the millions of lives lost. Incidental death occurs when life has no normative value, when no humans are involved, when the population is, in effect, seen as already dead.” Hartman highlights how the Atlantic slave trade created millions of corpses but, unlike the concentration camp or the gulag, extermination was not the final objective; it was a corollary to the making of commodities.

Destinations and flags of carriers
Most of the Atlantic slave trade was carried out by seven nations and most of the slaves were carried to their own colonies in the new world. But there was also significant other trading which is shown in the table below. The records are not complete, and some data is uncertain. The last rows show that there were also smaller numbers of slaves carried to Europe and to other parts of Africa, and at least 1.8 million did not survive the journey and were buried at sea with little ceremony.

African conflicts

According to Kimani Nehusi, the presence of European slavers affected the way in which the legal code in African societies responded to offenders. Crimes traditionally punishable by some other form of punishment became punishable by enslavement and sale to slave traders. According to David Stannard’s American Holocaust, 50% of African deaths occurred in Africa as a result of wars between native kingdoms, which produced the majority of slaves.

This includes not only those who died in battles but also those who died as a result of forced marches from inland areas to slave ports on the various coasts. The practice of enslaving enemy combatants and their villages was widespread throughout Western and West Central Africa. The slave trade was largely a by-product of tribal and state warfare as a way of removing potential dissidents after victory or financing future wars.

In addition, European nations instigated war between African nations and increased the number of war captives by making alliances with warring nations and shifted trade locations in coastal areas to follow patterns of African military conflicts to acquire more slaves. Some African groups proved particularly adept and brutal at the practice of enslaving, such as Bono State, Oyo, Benin, Igala, Kaabu, Ashanti, Dahomey, the Aro Confederacy and the Imbangala war bands.

In letters written by the Manikongo, Nzinga Mbemba Afonso, to the King João III of Portugal, he writes that Portuguese merchandise flowing in is what is fueling the trade in Africans. He requests the King of Portugal to stop sending merchandise but should only send missionaries. In one of his letters he writes:

Each day the traders are kidnapping our people—children of this country, sons of our nobles and vassals, even people of our own family. This corruption and depravity are so widespread that our land is entirely depopulated. We need in this kingdom only priests and schoolteachers, and no merchandise, unless it is wine and flour for Mass. It is our wish that this Kingdom not be a place for the trade or transport of slaves … Many of our subjects eagerly lust after Portuguese merchandise that your subjects have brought into our domains. To satisfy this inordinate appetite, they seize many of our black free subjects … They sell them. After having taken these prisoners [to the coast] secretly or at night … As soon as the captives are in the hands of white men they are branded with a red-hot iron.

Before the arrival of the Portuguese, slavery had already existed in the Kingdom of Kongo. Afonso I of Kongo believed that the slave trade should be subject to Kongo law. When he suspected the Portuguese of receiving illegally enslaved persons to sell, he wrote to King João III in 1526 imploring him to put a stop to the practice.

The kings of Dahomey sold war captives into transatlantic slavery; they would otherwise have been killed in a ceremony known as the Annual Customs. As one of West Africa’s principal slave states, Dahomey became extremely unpopular with neighbouring peoples.

Like the Bambara Empire to the east, the Khasso kingdoms depended heavily on the slave trade for their economy. A family’s status was indicated by the number of slaves it owned, leading to wars for the sole purpose of taking more captives. This trade led the Khasso into increasing contact with the European settlements of Africa’s west coast, particularly the French. Benin grew increasingly rich during the 16th and 17th centuries on the slave trade with Europe; slaves from enemy states of the interior were sold and carried to the Americas in Dutch and Portuguese ships. The Bight of Benin’s shore soon came to be known as the “Slave Coast”.

King Gezo of Dahomey said in the 1840s:

The slave trade is the ruling principle of my people. It is the source and the glory of their wealth … the mother lulls the child to sleep with notes of triumph over an enemy reduced to slavery …

In 1807, the UK Parliament passed the Bill that abolished the trading of slaves. The King of Bonny (now in Nigeria) was horrified at the conclusion of the practice:

We think this trade must go on. That is the verdict of our oracle and the priests. They say that your country, however great, can never stop a trade ordained by God himself.

Port factories

After being marched to the coast for sale, enslaved people were held in large forts called factories. The amount of time in factories varied, but Milton Meltzer states in Slavery: A World History that around 4.5% of deaths attributed to the transatlantic slave trade occurred during this phase. In other words, over 820,000 people are believed to have died in African ports such as Benguela, Elmina, and Bonny, reducing the number of those shipped to 17.5 million.

Atlantic shipment

After being captured and held in the factories, slaves entered the infamous Middle Passage. Meltzer’s research puts this phase of the slave trade’s overall mortality at 12.5%. Their deaths were the result of brutal treatment and poor care from the time of their capture and throughout their voyage.

Around 2.2 million Africans died during these voyages, where they were packed into tight, unsanitary spaces on ships for months at a time. Measures were taken to stem the onboard mortality rate, such as enforced “dancing” (as exercise) above deck and the practice of force-feeding enslaved persons who tried to starve themselves. The conditions on board also resulted in the spread of fatal diseases. Other fatalities were suicides, slaves who escaped by jumping overboard. The slave traders would try to fit anywhere from 350 to 600 slaves on one ship. Before the African slave trade was completely banned by participating nations in 1853, 15.3 million enslaved people had arrived in the Americas.

Raymond L. Cohn, an economics professor whose research has focused on economic history and international migration, has researched the mortality rates among Africans during the voyages of the Atlantic slave trade. He found that mortality rates decreased over the history of the slave trade, primarily because the length of time necessary for the voyage was declining. “In the eighteenth century many slave voyages took at least 2½ months. In the nineteenth century, 2 months appears to have been the maximum length of the voyage, and many voyages were far shorter. Fewer slaves died in the Middle Passage over time mainly because the passage was shorter.”

Despite the vast profits of slavery, the ordinary sailors on slave ships were badly paid and subject to harsh discipline. Mortality of around 20%, a number similar and sometimes greater than those of the slaves, was expected in a ship’s crew during the course of a voyage; this was due to disease, flogging, overwork, or slave uprisings. Disease (malaria or yellow fever) was the most common cause of death among sailors. A high crew mortality rate on the return voyage was in the captain’s interests as it reduced the number of sailors who had to be paid on reaching the home port.

The slave trade was hated by many sailors, and those who joined the crews of slave ships often did so through coercion or because they could find no other employment.

Seasoning camps

Meltzer also states that 33% of Africans would have died in the first year at the seasoning camps found throughout the Caribbean.

Jamaica held one of the most notorious of these camps. Dysentery was the leading cause of death. Captives who could not be sold were inevitably destroyed.[209] Around 5 million Africans died in these camps, reducing the number of survivors to about 10 million. The purpose of seasoning camps were to obliterate the Africans’ identities and culture and prepare them for enslavement. In seasoning camps, enslaved Africans learned a new language and adopted new customs. This process of seasoning slaves took about two or three years