What Was the Transatlantic Slave Trade?

The Atlantic Slave Trade affected the nations that carried out the trade and the people taken as slaves. Many of the effects linger today.

Jan 7, 2025By Mike Cohen, BA History

transatlantic slave trade

 

The history of humanity is checkered with the enslavement of people. The practice, which has existed for millennia, has taken many forms, such as the enslavement of people as prisoners of war following conflicts and in some cases due to their beliefs. Before the 15th century, subjugation based on factors such as race was rare. This is because there were limited interracial interactions. 

 

What Factors Gave Rise to the Atlantic Slave Trade?

christopher columbus santa marina
Artistic interpretation of Christopher Columbus’ Santa Maria, alongside the smaller Nina and Pinta shipping vessels. Source: Wikimedia

 

Many of the modern elements of slavery cropped up when European settlers, intent on colonizing the Americas, started to use violence to subdue indigenous populations. This was in a bid to implement forced labor. Attempts to enslave the indigenous people, however, backfired as a significant number of them started to die after enslavement. This was due to a combination of factors that included diseases and harsh labor conditions. To overcome the problem, the invading powers turned to the African continent for slaves to cater to their labor needs. Hence the Atlantic slave trade began.

 

How Were Slaves Taken from Africa? 

slave ship diligente hm sloop
The Portuguese slave ship Diligenté before being captured by US Navy Ship HM Sloop by Henry Samuel Hawker, 1838. Source: Smithsonian Institution

 

The massive task of bringing slaves from Africa relied on abductions and human trafficking at an enormous scale. Between the years 1500 and 1900, European powers relied on an enslavement model that took into captivity millions of people from regions such as West Africa and Central Africa and transported them across the Atlantic Ocean in immensely cruel conditions. 

 

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While slavery existed in Africa even before the Europeans arrived, demand for slaves was not high. However, the huge demand brought on by Western powers caused traders and slave agents to procure slaves far inland.

 

Europeans operated the slave ships while the task of kidnapping was largely left to African slave merchants. Groups of slavers roamed the country, preying on unsuspecting people. At other times, African leaders sold outcasts and people imprisoned for committing crimes to slave traders. In return, they received goods from Western countries such as iron bars, cotton, glass, and guns.

 

What Were the Main Slave Trading Nations?

slave trade africa
Slavers capturing people on the coast of Africa by George Morland, 1788. Source: National Museum of African American History & Culture, Washington DC

 

In terms of volume, Portugal traded the most slaves, and was followed closely by Britain. Others that followed were Spain, France, the Netherlands, the United States, and Denmark. Portuguese dominated the trade in the first 130 years but were surpassed by the British after 1651. Britain became the leading slave-trading nation at the peak of the trade in the 1780s. It is estimated that between 1600 and 1800, British ships transported over 3 million Africans across the Atlantic.

 

That said, many Western nations that needed slaves used companies involved in the Atlantic slave trade. Countries such as Spain set up agreements (asiento) with numerous entities to supply its Caribbean and Spanish American colonies with African slaves. Nations such as the Netherlands, France, and England used a different method. They contracted their own companies to distribute slaves to their colonies. Britain’s Royal African Company and the Dutch West India Company are examples of such companies.

 

The slave-shipping enterprises set up operations in major ports to organize, finance and insure slave ships. The profits generated from the trade economically transformed cities such as Bristol and Liverpool in England and Lisbon in Portugal into bustling economic centers. Each port, operated by the western merchants, had links to slave traders in the African hinterland to ensure a constant stream of captives. 

 

What Were the Effects of the Slave Trade on the World?

usa slave trade 1830s
The United States Slave Trade, 1830. Source: The New York Times

 

The Transatlantic slave trade had some serious effects on the affected African regions. It greatly impaired their potential to progress economically as well as their ability to maintain a stable socio-political environment due to the continuous exploitation of human resources. This also corrupted political and social structures by encouraging the ruling class to profit from the oppression of their own people. 

 

Additionally, the abduction of African people who came from all walks of life broke down the family unit in the regions where the slave trade occurred. This is because some of them were breadwinners with dependents and parents. 

 

Map of the Slave Trade from Africa to the Americas 1650-1860
Map of the Slave Trade from Africa to the Americas 1650-1860. Source: Wikimedia

 

For slaves that were taken from Africa and their descendants, the devastation affected them for centuries to come. This is because many of them were displaced and dispersed across the Americas and Western Europe. The situation led to more Africans being spread across the diaspora.

 

Today, direct descendants of Africans taken as slaves continue to face many enduring socio-economic problems that include inequality, prejudice, and racism as many of them reside in territories where they are considered a minority and non-natives. Conversely, slave-trading nations greatly benefited from the trade as it allowed them to increase the production of crops and raw materials needed to fuel the Industrial Revolution.

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By Mike CohenBA HistoryMike is Bachelor of Arts History graduate from the University of Leeds. As a historian, he loves to write about historical figures and events, especially those that continue to influence the modern world.