The Trade Reaches Its Highest Volume in the Late Eighteenth Century
More Africans are forced across the Atlantic between 1776 and 1800 than in any other quarter-century of the trade
Quick facts
- Peak period
- 1776-1800
- Estimated embarked, 1776-1800
- 2,008,670
- Estimated embarked, 1751-1775
- 1,925,315
- Source
- Trans-Atlantic Slave Trade Database
What happened
According to the Trans-Atlantic Slave Trade Database's decade-by-decade tally of documented and estimated voyages, the quarter-century from 1776 to 1800 saw more Africans embarked on slave ships, over two million people, than any other twenty-five-year span in the trade's roughly 400-year history. The preceding twenty-five years, 1751 to 1775, had already carried close to 1.93 million, meaning the trade's final major decades before serious abolition efforts began were also its largest by volume. British, French, and Portuguese traders all expanded shipments through this period to meet the labor demands of an expanding plantation system across the Caribbean, Brazil, and the American South.
Why it matters
The trade reached its greatest scale at precisely the moment Clarkson, Wilberforce, and Equiano were beginning to build the British abolition campaign, meaning abolitionists were fighting the trade at its historical peak rather than a trade already in decline. The scale of these final decades is also why the domestic and internal slave systems the trade fed, particularly in the American South and Brazil, remained large enough to persist for decades after the transatlantic trade itself was outlawed.
How we know
The Trans-Atlantic Slave Trade Database's published estimates table breaks the trade's volume into 25-year intervals based on more than 36,000 documented voyages and statistical estimation for undocumented ones, allowing historians to identify precisely which decades carried the largest number of captives.
Sources
- Trans-Atlantic Slave Trade Database (SlaveVoyages). Estimates · Primary source (author-declared)legacy.slavevoyages.org · Cited as a "primary" source (no stronger domain match).
- Lowcountry Digital History Initiative, African Passages, Lowcountry Adaptations. The Trans-Atlantic Slave Trade · Reputable sourceldhi.library.cofc.edu · The domain "ldhi.library.cofc.edu" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Part of a timelineThe Atlantic Slave Trade29 events · Four centuries in which European traders forced an estimated 12.5 million Africans onto ships bound for the Americas, and the enslaved people, revolts, and abolitionists who fought it from the first crossing to the lastView all →