As I write this, King Charles III is in Antigua and Barbuda for the Commonwealth Heads of Government Meeting. CARICOM has called it "the reparations CHOGM." Jamaica filed a $10 billion petition in London in September. Ghana's President Mahama is championing reparations at the African Union. The United Nations voted 123 to 1 in March on a reparations resolution.
The one dissenting vote was the United States.
This is not a fringe conversation. It is a global accounting.
I have spent the past several weeks doing what I know how to do: running the numbers, reading the scholarship, and stress-testing the assumptions. What follows is not an emotional appeal. It is the case, laid out as a practitioner would lay it out, for why the world owes a debt it has never paid.
The Promissory Note
In August 1963, Martin Luther King Jr. stood at the Lincoln Memorial and framed the struggle for civil rights in the language of finance. America, he said, had defaulted on a promissory note. He spoke of a bad check returned marked "insufficient funds." The crowd heard poetry. King meant it literally.
One year later, in Why We Can't Wait, he wrote explicitly about compensation. He referenced Frederick Douglass and the broken promise of forty acres and a mule. By 1967, he was calling for a $30 billion anti-poverty package: an Economic Bill of Rights that included full employment, guaranteed annual income, and low-income housing. He called it the Poor People's Campaign.
King was assassinated on April 4, 1968, days before the Campaign was to begin its march on Washington. The movement he built to demand economic restitution was cleared by tear gas and bulldozers.
There is a version of history that remembers King only for "I Have a Dream." That version is convenient. The full King, the one who said racism, economic exploitation, and militarism were all tied together, the one who knew the Campaign would attract enemies more powerful than any he had faced before, that King is less comfortable to remember.
We should remember him anyway.
The Full Ledger
Let us be precise about what was taken.
Between the 16th and 19th centuries, an estimated 12.5 million Africans were forcibly transported across the Atlantic. Roughly 1.8 million died in transit. Those who survived were stripped of their names, their languages, their labour, their children, and their futures.
The economic architecture this built was staggering. Eric Williams argued in 1944 that profits from the slave trade financed the Industrial Revolution. More recent scholarship has refined but not refuted the thesis:
- Rönnbäck (2018) found the entire commodity chain connected to slavery reached approximately 11% of British GDP by the early 19th century.
- Heblich, Redding, and Voth (2022, NBER) estimated that slavery wealth raised aggregate income by roughly one decade's worth of GDP growth.
- Brandon and Bosma calculated slave-related activities at 5.2% of Dutch national GDP and over 10% of Holland's provincial GDP.
These are not small numbers. They are the foundations of empires.
The ledger is incomplete if it counts only what was built in Europe. We must also count what was destroyed in Africa.
The Missing Millions
Patrick Manning's demographic models estimate that by 1800, Africa's population was half of what it would have been without the slave trades. The continent had virtually no population growth from about 1750 to 1850.
A 2023 study by the African Studies Association estimated the Atlantic trade alone reduced the African population by at least 25%, with some 12.39 million people "missing" by 1900. Computerised projections suggest Africa's population in 1850 would have been 50 million rather than 25 million. Africa's share of world population fell from 13% in 1750 to 8% in 1900.
The figure sometimes cited is 112 million "missing" Africans when all slave trades are accounted for.
Nathan Nunn's 2008 study found that the slave trade explains 72% of the income gap between Africa and the rest of the world, and 99% of the gap between Africa and other developing regions.
Let that number sit. Seventy-two percent.
This is the question that most reparations debates fail to ask. We speak of the enslaved, and rightly so. But what of their offspring? What of the generations who were never born, or were born into poverty because their grandparents were shipped across an ocean?
The opportunity cost of the slave trade is not merely the unpaid wages of those who toiled. It is the compounded productivity of every descendant who never had the chance to contribute to their own continent's development.
So what does the accounting look like?
- Craemer et al. (Review of Black Political Economy, 2020): Unpaid slave labour valued at $19.14 trillion compounded at 3% interest. At 6%, the figure reaches $6.6 quadrillion.
- Darity and Mullen (Journal of Economic Perspectives, 2022): Closing the Black-White wealth gap in the US alone costs $10 to $12 trillion.
- Osabu-Kle (Journal of Black Studies, 2000): Africa-wide figure of $100 trillion.
- Judge Patrick Robinson (2023): Britain owes $24 trillion to just 14 countries.
The numbers vary because the crime was so vast it resists a single accounting. But every serious attempt at quantification arrives at the same conclusion: the debt is real, it is enormous, and it remains unpaid.
Who Owes What
Portugal transported approximately 4.9 million enslaved Africans, more than any other nation, and was the last Western country to abolish slavery in 1888. Spain smuggled an estimated 500,000 illegally after abolition treaties were signed, earning reported returns of 100% on invested capital in under a year. France forced Haiti to pay 150 million francs for the privilege of its own freedom, a debt that strangled the world's first Black republic for over a century. Piketty has estimated France owes $28 billion. The Netherlands financed its Golden Age on the proceeds. Denmark, the seventh-largest trader, derived two-thirds of its national wealth from the trade.
Britain paid £20 million in 1833 to compensate slave owners when it abolished slavery. That was 40% of the national budget, roughly £17 billion in today's money. The loan was not fully repaid until 2015. Not a penny went to the people who had been enslaved.
The United States built its cotton economy on the backs of enslaved labour. HR 40, the bill to merely study reparations, has been sidelined since 1989.
The Arab and Islamic slave trades, often overlooked, transported between 11 and 18 million Africans over 1,300 years, with transit mortality rates around 50%. Saudi Arabia abolished slavery only in 1962.
And the institutions. Lloyd's of London insured slave ships. Predecessor banks of JPMorgan Chase owned over a thousand enslaved people. More than 80 universities, including Harvard, Yale, Brown, and Georgetown, are now investigating their ties to slavery wealth.
The Uncomfortable Middle: African Intermediaries
No honest accounting of the slave trade can ignore the role of African intermediary states. More than 173 city-states and kingdoms participated in the Atlantic trade. The Kingdom of Dahomey built systematic human trafficking operations. The Ashanti Empire captured individuals from neighbouring societies during wars. Coastal kingdoms brokered sales to European traders in exchange for textiles, metals, and firearms.
This is a fact. It is also, in the way it is often deployed, a distraction.
Consider the parallel to modern human trafficking. The existence of a market does not make participation in it morally acceptable. The buyer who creates demand bears responsibility alongside the seller. And in the case of the transatlantic trade, the buyer did more than create demand. The buyer supplied the weapons that made the trade self-perpetuating.
This is what scholars call the gun-slave hypothesis. The only way to obtain European weapons was through providing enslaved people. Guns and slave exports moved in long-run equilibrium. It was a cycle designed to feed itself, and designed in Europe.
King Agadja of Dahomey was, according to historical accounts, forced to support the trade because of his heavy dependence on European wares. This is not to absolve. It is to contextualise. A king who cannot defend his people without European guns has fewer choices than the textbooks suggest.
And then there is the question of proceeds. Where did the wealth go?
The answer, overwhelmingly, is that it went back to Europe. The real return leg of the triangular trade was paper: bills of exchange drawn on London. European textiles disrupted traditional African craft production. The guns fuelled more conflict. Africa provided the labour and received in return the instruments of its own destruction.
So when someone says Africans sold Africans and therefore the West bears no unique responsibility, the response is straightforward. The market was constructed, armed, and financed by European powers. The proceeds were banked in London, Amsterdam, and Lisbon. We do not excuse drug cartels because they employ local distributors.
What Justice Looks Like
I am pro-reparations. I state that plainly.
But I am also a practitioner, and practitioners think about implementation.
Cash transfers alone will not repair what was broken. The history is too deep, the systems too entrenched, and the risk of misappropriation in fragile governance environments too real. What was destroyed was not merely wealth. It was institutional capacity, demographic strength, educational infrastructure, and the self-determination of an entire continent.
Reparations should therefore take the form that matches the damage:
- Institutional building — hospitals, universities, research centres, courts of law
- Infrastructure — roads, ports, power grids, digital connectivity
- Human capital development — scholarships, teacher training, vocational programmes, technology transfer
- Targeted direct payments — carefully structured, to individuals and communities that can document lineage and demonstrate need
The model is not unprecedented. Germany has paid over $80 billion in Holocaust reparations. The United States compensated Japanese Americans interned during World War II. Britain, as noted, paid its slave owners handsomely.
The machinery of restitution exists. What has been lacking is the political will to point it in the right direction.
The Moment
We are living in a window.
The African Union has a champion for reparations in Ghana's President Mahama. Nigeria's Senate has established a Committee on Reparations. CARICOM is mobilised. The Commonwealth Secretary General has said an apology from King Charles "wouldn't hurt." One hundred and twenty-three nations voted in favour of the UN resolution.
Against this, the United States voted no, and Britain's government has ruled out both apology and payment. Russia, reading the room with its usual strategic opportunism, is offering support to Africa's claims.
The conversation is happening whether the former colonial powers are ready for it or not. The question is no longer whether reparations are justified. The scholarship is settled.
The question is whether the nations that built their prosperity on stolen labour and stolen lives will participate in the conversation voluntarily, or be dragged to it by the weight of their own history.
King spoke of a promissory note. Nearly sixty years later, it remains in default.
The interest is still compounding.
— David Apaflo
Practitioner. Thinker. African.