The African slave trade (1500–1900)

African political and merchant networks willing and able to supply captives (often war captives) to coastal traders — without this, European ships alone could not have obtained enslaved people.

The forced sea voyage of enslaved Africans across the Atlantic Ocean to the Americas, marked by extremely high death rates.

Sugar (and later cotton, tobacco) plantations needed huge, cheap, controllable workforces; European settlers and Indigenous populations could not or would not supply enough labour, so planters turned to enslaved Africans.

Wars between African states and kingdoms (e.g. for territory or dominance) produced prisoners of war, who were often sold to coastal traders — European demand and African conflict reinforced each other.

Some states like Dahomey and Asante built centralised power partly by controlling and profiting from the trade; others tried to limit or resist European encroachment — responses varied across the coast.

A centuries-old trade linking East Africa to the Middle East (Arabia, Persia, India) across the Indian Ocean, run largely through Swahili coastal city-states.

Sultan Seyyid Said moved the Omani court to Zanzibar in 1840, cementing Zanzibar as the centre of a commercial empire built on cloves and enslaved labour.

Large farms on Zanzibar and Pemba growing cloves for export, worked mainly by enslaved labour, which drove demand for captives from the East African interior.

British naval patrols targeted the Atlantic route, so traders shifted toward the less-policed Indian Ocean/Zanzibar route, which grew as an escape from Atlantic anti-slave-trade enforcement.

British laws: the 1807 Act abolished the slave trade (not slavery itself) within the British Empire; the 1824 Act made participation in the slave trade punishable as piracy, carrying the death penalty.

Atlantic: driven by European plantation demand, maritime commerce, and African warfare/rivalries (peaked 1500s-1800s). East Africa: driven by Omani political expansion, Zanzibar's clove economy, and traders escaping British Atlantic patrols (grew late 1700s-1800s).

To what extent was European/Middle Eastern demand (versus African political, economic, and military factors) the main driver of the slave trade's expansion — requiring a weighed, substantiated judgement, not a one-sided answer.

Social, economic, demographic, and political (expanding power of trade-based African states).

An independent settlement founded by enslaved people who had escaped, often in forests or mountains, defended over generations.

A holding pen or fort on the African coast where captives were kept before being sold and transported.

Dahomey (and the Asante Empire) — built military strength and political power using slave-trade profits and firearms.

Population growth stalled or reversed — the region saw little to no population growth for the entire century.

Because roughly two-thirds of Atlantic captives were male, leaving some regions with fewer men and heavier workloads on remaining women.

Day-to-day resistance, rebellion, escape (including maroon communities), and legal/political resistance.

Afonso I of Kongo wrote to the Portuguese crown in the early 1500s protesting the slave trade's effects on his kingdom, though with limited practical effect.

Day-to-day resistance (slow work, sabotage, preserving culture) was constant and low-visibility but widespread; rebellion (uprisings in barracoons, on slave ships) was rarer, more dramatic, and often crushed harshly.

In barracoons and slave forts on the African coast, and aboard slave ships during the Middle Passage.

No — historians debate this. Some states (e.g. Dahomey, Asante) were active beneficiaries who expanded power through the trade, while many smaller/inland communities were devastated by raiding.

Evaluating arguments — weighing diverse perspectives and evidence (e.g. state expansion vs. social/demographic damage) to reach a substantiated judgement on a 'To what extent do you agree' claim.

Trade in goods such as palm oil, groundnuts, timber and ivory that replaced the slave trade as a profitable West African export economy.

Industrialisation and new technology; rise of legitimate commerce; need for labour on African plantations; reduced productivity of slave labour.

Banned British subjects and ships from taking part in the transatlantic slave trade — it did not free enslaved people already in the colonies.

Made participating in the slave trade an act of piracy, strengthening enforcement of the 1807 ban.

The Slavery Abolition Act of 1833 — separate from and 16 years after the 1807 trade ban.

Thomas Clarkson, Granville Sharp and William Wilberforce, plus formerly enslaved campaigner Olaudah Equiano.

A Royal Navy patrol force that intercepted illegal slave ships off West Africa, freeing an estimated 150,000 people over the century.

From the 1880s, European powers used 'anti-slavery' claims to justify conquering African territory — a later moral cover for imperial expansion, not an original cause of the 1807 ban.

Declining Caribbean sugar profits and rising legitimate-commerce alternatives made ending the slave trade less costly for Britain by the early 1800s.

The abolitionist campaign began in the 1780s, before profits had clearly declined, and 300,000+ people signed the 1792 petition with no economic benefit to themselves.

1807 ended the trade (transport of captives); slavery itself continued in British colonies until the 1833 Slavery Abolition Act freed enslaved people.

Argument for the claim with evidence, argument against with evidence, then a substantiated judgement on which factor mattered most.