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This third installment of a series on the transatlantic slave economy traces the inner workings of the enslavement plantation system, unpacking its little-recognized role as a blueprint for modern corporate management. The series has previously followed the flow of enslaved people from African coasts to slave ships, then through auctions, financial institutions, and the compensation processes that finalized the trade of human lives. This entry turns to daily operations inside the plantation itself, anchored by a unique, unflinching archival document: the 36-year diary of Thomas Thistlewood.

Thistlewood arrived in Jamaica in 1750 as a young plantation overseer, and died there 36 years later as a small land and enslaved people proprietor. Over those decades, he filled 37 volumes with roughly two million words of detailed entries; today, the diary is held at Yale University and listed on UNESCO’s Memory of the World register as an irreplaceable historical record. As the most comprehensive surviving account created by a mid-level manager of the plantation system, Thistlewood’s diary logs every routine detail of his role: daily work assignments, food allotments, criteria for buying and selling enslaved people, and rates of illness and death among the workforce. Thirty-four of the notebooks include routine weather tracking, uncommented logs of brutal punishments he inflicted on enslaved people, and even 138 documented rapes of enslaved women, all recorded in the same flat, matter-of-fact tone used to note daily rainfall.

Historians uniformly emphasize that Thistlewood was no outlier, no monstrous exception to the system. The defining horror of plantation slavery is not that it attracted evil men, but that it normalized and commodified monstrous cruelty as a paid, salaried job role with formal accounting requirements.

In purely business terms, 18th and 19th century plantations were the largest, most sophisticated private enterprises of their era. A single Jamaican or Barbadian sugar plantation employed 200 to 300 enslaved workers under centralized management—a scale no European factory could match at the time. Unlike scattered agricultural operations, sugar production merged field work and manufacturing into a single, coordinated process. Because cut cane spoils within 48 hours of harvesting, milling and boiling operations ran around the clock during harvest season, organized into scheduled shift work. Work gangs were divided by task and physical capacity: first gang for the hardest labor, second gang for lighter work, and a children’s gang for small tasks, each overseen by a designated supervisor. Sugar historians have made the deeply uncomfortable observation that plantations developed modern industrial time-discipline decades before textile factories in Manchester, England. Far than the factory system coming to the Caribbean, it may well have originated there.

The hierarchical management structure of plantations would be instantly recognizable to any modern corporate leader. Increasingly, plantation owners were absentee landlords living in London or Bath, drawing income from remitted profits from the Caribbean. A local island attorney represented the owner’s interests, typically paid a commission on gross output, who in turn supervised salaried overseers like Thistlewood who directly managed the enslaved workforce. Printed formal management manuals circulated for overseers; Thistlewood’s own personal papers include a copy of Richard Beckford’s *Instructions for Overseers of Sugar Plantations*. Most notably, plantations developed formal, modern accounting practices. Estates conducted annual inventories of the enslaved people they owned, assigning each a monetary value in pounds sterling, with separate columns tracking what accountants called “increase” and “decrease” — births and deaths among the workforce, framed as shifts in working capital. Management scholars have confirmed that plantations applied depreciation accounting to enslaved human beings long before the industrial sector formalized the concept for depreciating machinery.

In the American South, cotton planters could purchase pre-printed plantation ledger books with pre-ruled columns to track daily cotton picking weights per enslaved worker and the assigned value of each person in their workforce. At the end of every cotton row, a scale recorded each picker’s daily output, entered by name next to their tally. From overseer’s ledgers to drivers’ daily tallies, to attorney reports to London accountants, information flowed up the hierarchy while discipline flowed down: this was a fully functioning modern corporation.

Plantation enterprises also demonstrated remarkable ingenuity in shifting operational costs to cut expenses. In Jamaica, plantation owners largely refused to provide food for their enslaved workforces. Enslaved people were forced to grow their own provisions on marginal, unused land during what was labeled their “free time,” out of this necessity emerged an independent, informal internal market economy. Enslaved people sold surplus produce to one another and to white planters at weekly Sunday markets, allowing them to accumulate small amounts of private money. Even Thistlewood regularly bought food from the enslaved people he exploited and abused. This survival economy of provision grounds, Sunday markets, and small-scale independent trading — a practice that still sustains many communities across the Caribbean today — began as a plantation cost-cutting tactic, and evolved into the first act of independent commercial activity by Black people in the Americas.

The three major regional systems of chattel slavery adapted this core corporate model to local needs, as outlined in the previous entry in the series. Caribbean sugar plantations operated on a model of high throughput and high mortality, constantly replacing the enslaved workers they worked to death. The American South shifted to a model of capital appreciation, where the growth of the enslaved population through birth increased the owner’s balance sheet assets. Brazil eventually combined both models. Its early sugar engenhos in Bahia and Pernambuco predate the Barbados plantation system as the original template, and its 19th century coffee fazendas marked the last great expansion of chattel slavery. After the transatlantic slave trade was closed in 1850, an internal Brazilian slave trade moved enslaved people south, until coffee-growing regions held roughly two-thirds of Brazil’s total enslaved population. Brazil also added one more financial tool accountants embraced: a formal market for manumission. Large numbers of enslaved people were able to purchase their own freedom, often via installment payments. Freedom itself was priced, financed, and paid off like a mortgage, and by the final decades of slavery, free people of color outnumbered enslaved people across the country. Even exit from slavery was monetized.

So what were the actual returns on this enterprise? J.R. Ward’s landmark two-century study of British West Indian sugar plantation accounts puts the average long-term profitability of these enterprises at roughly 10 percent — a standard, respectable return on investment identical to the returns generated by transatlantic slave trading voyages. To illustrate just how socially acceptable and respectable this business was, consider one telling example: from 1710 onward, the Society for the Propagation of the Gospel in Foreign Parts — the missionary arm of the Church of England, presided over by the Archbishop of Canterbury — owned the Codrington Plantations in Barbados, which had been bequeathed to the organization to fund a theological college. Enslaved people held on the estate were even branded on the chest with the word “SOCIETY.” Estate records show the plantation generated £2,472 in annual profit in the 1820s from 359 enslaved people, a 7.7 percent return on investment. When slavery was abolished in British colonies, the organization filed a claim with the slave compensation commission like any other proprietor, and on May 9, 1836, collected £8,558 2 shillings and 2 pence in compensation for 410 enslaved people. The Church of England issued a formal apology for this role only in 2006, and in 2024 its mission society committed £7 million in reparative funding to Codrington descendant communities. While the Barbados Reparations Task Force welcomed the gesture, it correctly noted that this payment does not meet the definition of full reparations. The theological college still stands on the original plantation land, and the brutal financial arithmetic of slavery remains visible there today.

Every major institution of the 18th and 19th centuries — banks, insurance firms, parliaments, and even churches — found the plantation system not just tolerable, but profitable and respectable. That 10 percent average return did more than corrupt individual men like Thistlewood: it co-opted an entire civilization into participating in the exploitation of enslaved people. The enslaved people documented in Thistlewood’s diary left almost no first-person written records of their own. What they did leave was their independent provision ground economy, Sunday markets, families rebuilt against overwhelming odds, and a culture that outlived the plantation system itself. Two separate economies grew from the same Caribbean soil: one documented in slaveowner ledgers, one carried within the bodies and communities of enslaved people. When full emancipation came on August 1, 1838, only one of those economies proved permanent. The next and fourth installment of this series will examine that historic day, and the new ledger that emancipated people opened for themselves.

The Caribbean island nation of Dominica is gearing up for a major transformation of its tourism sector, with the flagship 6.6-kilometer Dominica Cable Car project on track for completion by the end of this year. That is according to the country’s Tourism Minister Denise Charles-Pemberton, who outlined the government’s broad tourism development strategy during an address to a three-day Business Cruise Stakeholders Symposium held this week at Goodwill Parish Hall.

Beyond the high-profile cable car initiative, Charles-Pemberton confirmed that construction and upgrade work is progressing steadily across multiple key tourist attractions across the island. Active development is ongoing at major sites including the new Champagne Beach Facility, Ti Tou Gorge and Emerald Pool, while planned upgrades include resurfacing critical access roads and improving ecotourism hotspots such as Morne Bruce, Mero Beach, Trafalgar Falls and Cold Soufriere.

The minister emphasized that the cable car project, in particular, will deliver both immediate and long-term benefits for Dominica’s economy and tourism brand. “The Dominica Cable Car set for completion later this year will transform our tourism offering, creating immediate local employment while positioning our destination for long-term growth,” she told attendees.

Awarded to Austrian cable car engineering leader Doppelmayr Group, the 4.1-mile gondola line will traverse the Roseau Valley, and when finished it will claim the title of the world’s longest recreational cable car. Per project details first released in August 2022, the system will feature 10-passenger detachable gondola cabins that can shuttle visitors from the valley base to the mountainous national park in under 20 minutes, delivering a fast, comfortable and reliable journey.

Doppelmayr’s project plans include localized hospitality and retail facilities at the cable car’s bottom station designed to highlight Dominica’s unique Caribbean cultural and natural heritage. Near the top station, visitors will find additional amenities including a panoramic café terrace, a public viewing platform, and a six-meter tall statue of the Sisserou Parrot, Dominica’s iconic national bird.

Early projections from feasibility studies point to dramatic growth for the island’s tourism sector following the cable car’s launch. A 2022 feasibility assessment conducted by Swiss-based European engineering firm Outdoor Engineers found that completing the project could triple Dominica’s annual tourism arrivals, according to reporting from Dominica News Online referencing the Associated Press.

Despite the progress on physical infrastructure, Charles-Pemberton stressed that destination competitiveness requires more than just new construction. In an era of shifting global travel trends, she noted that today’s tourists are more digitally connected, better informed, and have a wider range of destination options than at any point in history. These changes, she added, mean technology is rapidly reshaping how tourism destinations market themselves, compete for visitors, and deliver memorable travel experiences.

The minister pointed to the growing role of cutting-edge technology in the sector as evidence of this shift, noting that a discussion of artificial intelligence would have been unthinkable on a Dominican tourism symposium agenda just 10 years ago. “Today, discussing AI and digital innovation is essential if we intend to remain competitive,” she emphasized.

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My first introduction to the transatlantic slave trade was not through a chronicle of human suffering, but through an academic deep dive into the history of global finance. As a PhD student tracking the development of modern financial systems from ancient civilizations to the modern era, I stumbled across the little-examined story of Hector Davis, a 19th-century slave trader operating out of Richmond, Virginia. In 1859 alone, Davis’s single auction house generated more than $2.67 million in sales of enslaved human beings – a sum that outstripped the total value of flour exported by Virginia that year, despite Richmond hosting two of the United States’ largest flour mills, and came almost equal to the value of the entire state’s tobacco exports.

Davis’s enterprise operated with the precision and structure of a modern commodity exchange. The *Richmond Enquirer* ran a daily column listing upcoming slave auctions, formatted exactly like the stock market listings that run in contemporary financial newspapers. On an October morning in 1857, Davis placed an advertisement for 15 enslaved people set to go under the hammer at 9:30 a.m., positioned directly between listings from two competing traders offering 10 and 12 people respectively. In his business directory listing, Davis promised to “exert best efforts to secure the highest market prices” for sellers, and even offered lodging for enslaved people waiting to be sold in his “secure and spacious holding jail” for 30 cents per day.

Like any professional broker, Davis distributed standardized price sheets to clients. In a May 1858 letter to a client in North Carolina, he quoted current market rates for enslaved people with the same precision a modern financial broker uses to quote bond prices: prime working men $1,200-$1,275; girls aged 12 to 15, $750-$1,000 “adjusted for size”; a young woman with her child, $1,000-$1,100. He even closed the pricing section with a market update, noting that the trade was “rather sluggish” at that moment. Combined, Richmond’s network of slave traders moved between 8,000 and 10,000 enslaved people through this formal exchange every year. When Davis died in 1863, his estate was appraised at $100,000, a massive fortune for the era.

My research also uncovered correspondence between slave traders that lays bare the normalized commodification of human life. A letter dated January 19, 1854, written by A. J. McElveen, a South Carolina-based purchasing agent for Charleston broker Ziba B. Oakes, offers a striking example. McElveen wrote that he had recently purchased an enslaved man named Isaac, who was trained as a carriage driver, painter, varnisher, and panel door carpenter. “He also plays the violin and other musical instruments exceptionally well,” McElveen noted, adding that Isaac was also a skilled cook. “He is a genius… I honestly think he is smarter than I am.”

McElveen went on to catalog Isaac’s physical attributes with the specificity of a livestock merchant: approximately 28 years old, five feet ten inches tall, weighing 150 to 160 pounds. He calculated that Isaac could be resold for $1,500, a tidy profit for the firm.

These surviving archival records deliver an unflinching, clear-eyed portrait of what Atlantic chattel slavery actually was. It was not merely an expression of racial hatred or cultural prejudice, though those existed to justify it. At its core, it was a large-scale formal industry, operated by professional businesspeople, financed by major banks, priced through open market mechanisms, insured by global underwriters, and accounted for down to the last penny. We need to confront the numerical reality of this system, because cold data cuts through the soft, distorted folk memory that has often obscured slavery’s true scale and nature.

Over the course of roughly 350 years, an estimated 12.5 million African people were forcibly loaded onto transatlantic slave ships, and only 10.7 million survived the deadly Middle Passage crossing. One fact that surprises most people raised on popular American cultural narratives is just how few of those survivors arrived in what would become the United States: fewer than 4% of the total, equal to roughly 389,000 people. Brazil absorbed close to 5 million enslaved people, while the Caribbean received more than 4 million. Jamaica alone took in roughly 1 million.

In the 17th century, Barbados was the economic engine of the entire British slave enterprise. Contrary to common popular framing, the geographic center of gravity of Atlantic slavery was not the American South – it was the Caribbean.

The divergent demand for enslaved labor between the Caribbean/Brazil and the American South can be traced directly to two starkly different business models, based on brutal, unemotional arithmetic. The formula was simple: sugar production killed. On the plantations of Jamaica and Saint-Domingue, annual death rates consistently outpaced birth rates, a built-in structural feature of the industry. Saint-Domingue imported roughly 800,000 African people over its history, but when the Haitian Revolution began in 1791, the colony only held about 500,000 enslaved people – the rest had been worked to death. Planters explicitly calculated the costs: it was cheaper to work an enslaved person to death and purchase a replacement than it was to provide adequate food, rest, and care to sustain a long working life. Enslaved people were formally recorded on plantation books as depreciating capital equipment, expected to lose value over time until they were entirely consumed.

The United States developed a second, equally monstrous model. Starting from that initial base of 389,000 imported enslaved people, the enslaved population grew through natural birth to nearly 4 million by 1860. This was the only major slaveholding society in the hemisphere where natural growth replaced ongoing importation, creating a system rooted in human beings as appreciating capital: children were a source of future yield. When the cotton boom opened new lands in the Deep South, more than 1 million enslaved people were sold and force-marched south from Virginia and Maryland in a domestic second Middle Passage, with Hector Davis’s Richmond auction house serving as one of the primary hubs for this trade.

Around this singular asset class grew the entire edifice of 19th-century American capital. By 1860, the total assessed value of enslaved people in the United States hit $3.5 billion, exceeding the combined value of all the nation’s railroads and factories. Enslaved people were the young republic’s largest single asset class. Cotton made up more than 60% of all U.S. exports by value. In Louisiana, enslaved people were used as collateral for the majority of mortgage lending by value: planters borrowed against the lives of enslaved people exactly as modern homeowners borrow against their property. Global underwriters insured all slave-related cargoes. When the crew of the British ship Zong threw 132 living enslaved Africans overboard in 1781 to preserve the ship’s water supply, the subsequent court case was not a murder trial – it was an insurance dispute, *Gregson v Gilbert*, where claimants sought 30 pounds per person compensation, argued before England’s highest commercial court.

Even when the institution of slavery was formally abolished, the financial system settled its accounts in favor of the former slave owners. Britain’s 1833 Slavery Abolition Act allocated 20 million pounds (equal to roughly 40% of the British government’s entire annual budget at the time) in compensation to 46,000 enslavers for the loss of their human property. Enslaved people who had gained their freedom received no compensation at all – instead, they were forced to work another four years of unpaid “apprenticeship” for their former owners. The government debt issued to fund these compensation payments was only fully paid off in 2015, within the lifetime of every adult alive today reading this analysis.

Surviving archival records list every claimant, estate by estate, across what is now the CARICOM bloc. Starting in Barbados, where the modern sugar plantation system was first developed: on May 16, 1836, the owners of Drax Hall estate, which has remained in the same family since the 1640s to the present day, received 4,293 pounds, 12 shillings, and sixpence in compensation for 189 enslaved people. Barbados as a whole received 1.7 million pounds for 82,807 people. In British Guiana, compensation payouts were even larger, as newer plantations held younger enslaved populations that commanded higher market prices. Commissioners paid roughly 50 pounds per person in British Guiana, compared to just 20 pounds per person in soil-exhausted Jamaica.

Location dictated price, exactly as it does for any other commercial asset. The Anna Regina estate on the Essequibo coast collected 40,353 pounds for 805 people, with the payout processed through the London banking house of Bevan, Barclay and Tritton – even compensation required the services of the financial sector. The single largest claimant in the Caribbean was John Gladstone of Liverpool, who received 106,769 pounds across nine claims for 2,508 enslaved people held in Demerara and Jamaica, including the Success estate where the major 1823 slave rebellion broke out. His son William later served four terms as Prime Minister of the United Kingdom. In Jamaica, Gladstone also appears as a mortgagee on the Holland estate in St Elizabeth, collecting 5,624 pounds in compensation for 300 enslaved people pledged as collateral against a loan. While the people who had been held as collateral gained their freedom, the lender was made entirely whole.

Antigua, the only British colony that freed enslaved people immediately without the transitional apprenticeship system, still paid full compensation to former enslavers. The Pares estate received 2,551 pounds for 170 people. In St Vincent, the Grand Sable estate claimed 17,753 pounds, five shillings, and seven pence for 704 people, meaning each person was valued at just under 25 pounds on the compensation rolls – and every name on that list is somebody’s ancestor.

We are approaching Emancipation Day, a holiday that marks the formal abolition of chattel slavery. This year, let us not only celebrate the joy of liberation. Let us also confront the cold, unyielding financial reality that made abolition a transaction that enriched enslavers at the expense of the people they had enslaved. The debt from that original compensation payout was not settled in 1834, or in 1865 – it was paid off within our own lifetimes. The formal ledgers are closed, and the official accounts are balanced, but the work of historical reckoning belongs to us.

Tomorrow, Part 3: The Business of the Plantation.

This article is written by Professor C. Justin Robinson, Pro Vice-Chancellor and Principal of The UWI Five Islands Campus.

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As we approach Emancipation Day 2026, reflections on the transatlantic slave trade demand more than surface-level commemoration — they demand a clear-eyed examination of the deeply commercial infrastructure that sustained the centuries-long system of human trafficking. This inquiry began for me, a scholar researching the evolution of global financial institutions from antiquity to the modern era during my doctoral studies at the University of Manchester, when I first encountered the hidden business records of the trade in enslaved people. Among these records, one document stands out as a singular and unflinching window into the day-to-day operations of the trade: the diary of Antera Duke.

Duke, a prominent Efik merchant prince and leader of what was then Duke Town (in present-day Nigeria), kept his daily journal between 1785 and 1788, written in the trade English commonly used along the West African coast. First published in a comprehensive scholarly edition by Oxford University Press in 2010, this diary is the only known surviving day-by-day account of the slave trade written by an African slave trader. What makes it so striking is its unemotional, strictly commercial tone: Duke logs customs duties (called “comey”) collected from European ship captains, records dinners hosted aboard British vessels from Liverpool, details credit disputes and their resolutions, and tracks consignments of enslaved people delivered downriver to waiting buyers. There is no moral hand-wringing, no indication of the horror of the trade being documented — it is, unapologetically, the journal of a businessman running a profitable enterprise.

Duke’s diary forces a critical, often overlooked question: before enslaved people were sold at auction in Richmond, Virginia, before they were forced to harvest sugar cane in Barbados, before they were packed onto overcrowded transatlantic crossing ships, who ran the upstream commercial business of capturing and selling enslaved people, and what were the terms of that trade? The historical record is uncomfortable on all sides, and it contradicts the common simplified narrative that Europeans directly captured most enslaved people themselves.

In reality, the harsh disease environment of coastal West Africa earned the region the nickname “the white man’s grave”: roughly half of all newly arrived European settlers and traders died within a year of landing, forcing Europeans to remain on their ships or in isolated coastal forts, relying entirely on local African actors to supply the enslaved people they purchased. The work of capturing, marching, and selling enslaved people at coastal trading points was controlled by West African states and established merchant networks: the Kingdom of Dahomey, which operated the key port of Ouidah under a royal customs monopoly; the Aro trading network of Igboland; and the canoe-house merchant firms of Bonny and Old Calabar, where Duke himself was a leading partner. Enslaved people were acquired through a range of violent systems — warfare, raids, judicial punishment, debt seizure, and kidnapping — before being sold directly to European buyers at coastal trading beaches, where the African supply network and European shipping industry converged.

This history cannot be softened, but it also cannot be reduced to a single simplistic narrative. The historical archive holds two concurrent truths that must both be acknowledged: many African rulers and merchants profited directly from running the supply side of the trade, but other African leaders recognized the catastrophic damage the trade was inflicting on their communities and spoke out against it centuries before abolition. As early as 1526, Afonso I, the Christian monarch of the Kingdom of Kongo, wrote a formal letter to the King of Portugal protesting that Portuguese-backed traders were seizing his people daily, writing that “our country is being completely depopulated” and begging the Portuguese crown to send priests and religious materials rather than more slave traders and trade goods. This letter survives in official archives to this day. The demand for enslaved people came from European powers across the Atlantic, and that demand transformed and industrialized violence across inland West Africa. Both facts are equally true, and neither negates the other.

Tracing the flow of money through the trade also reveals how interconnected the early modern global economy already was, built entirely on the exploitation of enslaved people. The price of an enslaved person was calculated in a negotiated “assortment” of goods, valued in standardized trade units like the trade ounce. Contrary to popular myth, these assortments were not made up of cheap trinkets. Economic historian David Richardson’s analysis of more than 90 English slaving voyages found that the highest-value category of goods traded was textiles, most notably handwoven Indian cottons from Gujarat and Bengal. Next came guns produced in Birmingham, with hundreds of thousands of firearms traded annually at the height of the trade. The bundle also included iron bars, distilled spirits like brandy and rum, and cowrie shells harvested in the Maldives and shipped by the ton to West Africa to use as small currency: abolitionist and formerly enslaved author Olaudah Equiano recorded that he himself was sold for 172 cowries. This means a weaver in Bengal, a gunsmith in Birmingham, a shell diver in the Maldives, and an enslaved laborer in the Caribbean were all part of a single interconnected global supply chain, even if they never knew one another existed. As demand for enslaved people outstripped supply through the 18th century, prices rose roughly five-fold along the West African coast, following standard commercial market dynamics.

Even the transatlantic slave ship itself functioned as a sophisticated financial instrument. A typical English slaving voyage was divided into 64 tradable shares, held not just by wealthy elite merchants, but also by small investors: local shopkeepers, clergymen, even widows who held a single 64th share as a long-term investment. By 1790, outfitting a single slaving voyage out of Bristol cost roughly £8,500, and the full round trip from Europe to Africa to the Americas and back took 12 to 18 months, with profits mostly returning to investors as bills of exchange drawn on London banks. The popular textbook narrative of a neat triangular trade of goods, enslaved people, and sugar is partially a myth; most returns from the voyage came in the form of financial paper, not physical cargo.

Voyages were fully insured, with premiums totaling roughly 10% of the total outbound cost. The Middle Passage crossing itself was priced at a 4.8% premium, with each enslaved person insured for £30 per head. Insurance policies explicitly excluded coverage for deaths from illness, suicide, or insurrection, unless losses exceeded 10% of the cargo’s total value — a quiet acknowledgment of the constant risk of both disease and rebellion on these voyages. Notably, economic historians who have reconstructed historical underwriting records find that slaving voyages were not unusually risky investments to insure; in fact, insuring a voyage run by the British East India Company cost more than insuring a slaving voyage.

When the British Parliament first passed regulation of the slave trade in 1788, it regulated the trade purely as a logistical and commercial enterprise. The Dolben’s Act set a legal limit on the number of enslaved people a ship could carry based on its tonnage: the Liverpool ship Brookes, which had previously carried 609 enslaved people in a single voyage, was now legally permitted to carry only 454, with each enslaved man allotted just six feet of length and 16 inches of width of space. The act even included incentive pay: captains received a £100 bonus and surgeons received a £50 bonus if mortality during the crossing fell below 2%.

Mortality was explicitly treated as a key performance indicator for the trade. Across the entire transatlantic trade, roughly one in every seven enslaved people died during the Middle Passage crossing. Abolitionists quickly exposed a second devastating mortality statistic that proponents of the trade could not refute: European crew members died at shocking rates too. When abolitionist Thomas Clarkson analyzed official crew muster rolls, he found that in a single year, 216 of 910 Bristol slave-trade sailors died — more deaths than the rest of Britain’s commercial shipping combined over two years. The trade, often hailed by proponents as a “nursery of seamen” for Britain, was in fact a deadly graveyard for the sailors who worked on the ships.

What kind of profits did the trade actually generate? Modern scholarship delivers a cold, clear answer: average profits for British slaving voyages landed between 8% and 10%, with one careful analysis by historian Roger Anstey finding an average return of 10.2%. While there was enormous variance across voyages, and some large firms earned far higher returns during boom years, the consensus average tells an important story: the slave trade delivered a normal commercial return, comparable to other ordinary shipping investments. The trade persisted for three centuries not because it was an extraordinary, once-in-a-generation bonanza, but because it was an ordinary, diversified, insurable, and socially respectable investment open even to a clergyman’s widow with a single share.

While investors in Europe earned steady, ordinary returns, Africa paid a catastrophic cost that no financial ledger ever recorded. One careful demographic estimate suggests that Africa’s total population in 1850 was half what it would have been without the transatlantic slave trade, and modern economic analysis still finds the long-term structural scars of this depopulation and exploitation in contemporary development data.

The trade was built on systematic record-keeping and ledgers, but it was also dismantled by activists who used the same tools of data and documentation to expose its horrors. Clarkson’s mortality tables from crew muster rolls, the widely circulated diagram of the overcrowded ship Brookes printed and distributed 7,000 times across Britain, Equiano’s bestselling memoir of his experience of enslavement and freedom: these formed the first data-driven human rights campaign in history, where numbers were marshaled to challenge the power of the pro-slave trade lobby. This work stands in that long tradition of using clear historical evidence to confront the legacy of the slave trade.

But Antera Duke’s diary leaves no room for comfortable moral certainties, and it should leave readers uneasy as well. Both European buyers and African sellers kept careful commercial ledgers of the trade in human lives. There is no easy way to cast all responsibility on “somebody else” when the historical record makes clear that actors on both sides of the coastal trading beach participated in and profited from the system. Every generation, as it confronts the legacy of slavery, has to decide for itself which side of that beach it stands on.

Tomorrow, Part 2 of this series will examine the auction room where enslaved people were sold in the Americas, and the financier who bankrolled the trade.

This article is written by Professor C. Justin Robinson, Pro Vice-Chancellor and Principal of The UWI Five Islands Campus.

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