The Bitter History of Chocolate

In one sentence: Cacao was once a sacred offering and "money that grew on trees" in Mesoamerica; today it anchors a roughly $150 billion global industry that still runs, in no small part, on the underpaid and sometimes coerced labor of the people who grow it — this episode asks how much of that has actually changed, and how much has just changed shape.

How We Got Here

Cacao originated in the Amazon basin and spread south into what's now southern Ecuador, where archaeological evidence shows people were consuming it at least 5,000 years ago. It moved north into Central America and southern Mexico, where Indigenous civilizations developed four distinct uses for it: a food flavoring, a beverage (with thousands of recorded recipes), a spiritual offering present at royal marriages and funerals, and — crucially — a currency.

When Spanish conquistadors arrived in the early 1500s, they encountered the largest cacao-producing region in the world on the Pacific coast of El Salvador, the Izalcos region, where the Pipil people were already roasting and deshelling cacao beans, grinding them into paste, and sweetening the result with honey or agave — sometimes adding vanilla. That recipe, historian Carla Martin notes, is "very, very similar" to dark chocolate today. The Spanish shipped cacao home as medicine (for fatigue, digestion) while, back in Mesoamerica, they imposed the encomienda system: Indigenous people were forced into labor on cacao "orchards" under the pretense of protection and Christian conversion, with the actual result being mass death and violence. Spain's much larger investment went into sugar — plantation labor so brutal that cacao, comparatively, came to be seen as work suitable for children and the elderly, even though 16-to-18-hour days, six or seven days a week, were still, in Martin's words, "an absolutely brutal system of labor."

For centuries, chocolate as a drink remained a luxury of the Spanish nobility, spreading to other European courts largely through royal marriages. By the 1700s, a new mercantile class was growing rich on the slave trade and the commodities it moved. The 1800s brought the hydraulic press, which separated cocoa butter from cocoa powder and, combined with industrial-scale grinding, made chocolate dramatically cheaper — just as Britain's industrial revolution created a market for cocoa as a cheap source of calories and comfort, marketed directly at children.

Around the same time, Latin American and Caribbean colonies were winning independence — Brazil from Portugal around 1822 — and Portugal, fearing the loss of its cacao "crown jewel," transplanted cacao trees to its island colony of São Tomé and Príncipe in the Gulf of Guinea, where it had already pioneered sugar-plantation slavery in the late 1400s and kept people enslaved until the 1870s. That existing system of unfree labor became the backbone of the next cocoa boom.

In 1901, William Cadbury — heir to one of Britain's largest chocolate companies and a devout Quaker from a family with a long anti-slavery history — opened a sales catalog and found laborers listed for sale alongside land and machinery on a São Tomé cocoa estate, one of his own suppliers. He pressed the Portuguese government, which insisted the workers were freely recruited in Angola under five-year contracts. In 1904, investigative journalist Henry Wood Nevinson offered to look into it; Cadbury, worried Nevinson had already decided what he'd find, politely turned him down — a decision that backfired. Nevinson got a commission from Harper's magazine and traced the recruitment route himself, from Angola's humid interior to its arid, desert-like coast, then across the sea to São Tomé. He documented skeletons along the route, wooden shackles hanging in the bushes, and workers marched under armed guard with no real say in the matter. He arrived on the island gravely ill from the journey and kept filing dispatches anyway: an annual death rate of 12 to 14 percent on the plantations, blamed by one plantation doctor on "anemia" caused, he casually added, by "unhappiness"; on one of the best-managed estates, a quarter of all children died each year.

Nevinson's Harper's series ran in 1905, followed the next year by his book A Modern Slavery, and public outrage — boycotts, letter-writing campaigns — landed squarely on Cadbury. What the public didn't know was that Cadbury had quietly sent his own investigator (who took the opposite route, starting in São Tomé) after rejecting Nevinson, and by 1907 that investigator had reached the same conclusion: "If this is not slavery, I know of no word in the English language that correctly characterized it." Privately, Cadbury had been pushing both the British and Portuguese governments to act. Publicly, he sued a newspaper, The Standard, for libel over accusations that his company had known and done nothing. He won — but the jury awarded him just one farthing, a quarter of a penny, a verdict that reads as much like an accusation as a vindication. In 1909, Cadbury announced it would stop sourcing from São Tomé and shift to free smallholder farmers in Britain's Gold Coast colony, soon to become Ghana — the small-family-farm model that still dominates global cocoa production today.

That fix didn't end the story. As chocolate demand kept climbing through the 20th century, prices paid to farmers often failed to keep pace with inflation, or fell outright, since farmers were paid by the weight of what they produced rather than for their labor. The pressure to produce more, for less, pushed families toward putting their children to work. According to Walk Free's Global Slavery Index, roughly 16,000 children a year are trafficked into unpaid labor on cocoa farms in Ghana and Côte d'Ivoire — but the more common pattern, by far, is children working on their own family's land, carrying loads too heavy for developing bodies and getting exposed to pesticides. Of the world's 5 to 6 million cocoa farmers, about 2 million are in Ghana and Côte d'Ivoire, and 90 to 95 percent of them work small plots "you could walk around in a matter of minutes." Companies including Cadbury, Nestlé, and Hershey have since worked with the Ghanaian government and nonprofits — including the International Cocoa Initiative — to reduce child labor, with some success, but hazardous child labor remains, as the episode puts it, "still a fixture" of West African cocoa farming.

The Core Argument and the Twist

The episode's sharpest turn isn't that chocolate has an ugly history — that's almost expected. It's that the very fix for the last ethical crisis became the seed of the next one: Cadbury ended a slave-plantation system by moving cocoa onto "free" family farms, and it's precisely that family-farm structure that makes today's child labor so hard to see and so hard to name. Nobody is chained; a child is just helping on the family plot, which makes the line between "chore" and "exploitation" genuinely difficult to draw.

The other twist is Cadbury himself: a company that built its identity on Quaker conscience knew the truth privately well before the public did, and rather than owning it, sued the newspaper that exposed it — winning the case on paper while the jury's one-farthing award quietly delivered the opposite verdict. The show doesn't cast Cadbury as villain or hero; it leaves the tangle of conscience and commerce for the listener to sit with. The modern echo lands just as hard: when a professor at UPenn told Shadrack Frimpong that Ghana was the world's second-largest cocoa exporter, earning billions of dollars, Frimpong's question cut straight to the point — "If cocoa farmers are that crucial, how come we're so poor?" In a $150 billion industry, the people growing the crop are consistently the ones capturing the least of its value.

Key Voices

• Carla Martin — a lecturer in African and African American studies at Harvard and president of the board of the Institute for Cacao and Chocolate Research. She lays out the entire arc from Amazonian origins through the encomienda system to today's child labor crisis, and pushes back on treating chocolate as a trivial subject — what she calls the "Willy Wonkafication" of a serious ethical issue.
• Catherine Higgs — a history professor at the University of British Columbia specializing in commodity history, and author of Chocolate Islands: Cocoa, Slavery, And Colonial Africa. She reconstructs the archival details of the Cadbury-Nevinson-São Tomé scandal, including the libel case that ended in a one-farthing verdict.
• Sebastian Walker — a British journalist who voices Henry Wood Nevinson's original dispatches from Angola and São Tomé throughout the episode.
• Shadrack Frimpong — one of six children of cocoa farmers from western Ghana, now finishing a medical degree at Yale and running a nonprofit aimed at improving conditions for Ghanaian cocoa farmers. His account of nearly losing a leg to infection as a child — and of his cousin Grace, pulled out of school to work the family farm after her father fell ill, who never came back — carries the episode's emotional weight.
• William Cadbury and Henry Wood Nevinson — historical figures rather than interview subjects: the Quaker heir to the Cadbury chocolate empire, and the muckraking journalist he first rejected and later, in effect, vindicated. Their wary, complicated relationship anchors the episode's second act.
• Ramtin Arablouei and Rund Abdelfatah — the show's hosts. Arablouei opens the episode by making hot chocolate at home with his young son Rumi, grounding the industrial history in the most ordinary of winter rituals.

Quotable Lines

"Cocoa is considered an orphan crop in that it does not have the same research resources that we see for things like rice, potatoes, fish, etc. And as a result, it is less studied, it is less written about, it is less understood." — Carla Martin

"...it's like the Willy Wonkafication of chocolate. And it is actually very serious business." — Carla Martin

"...cacao was quite literally the money that grew on trees." — Carla Martin

"That path is strewn with dead men's bones ... These are the skeletons of slaves who have been unable to keep up with the march, and so were murdered or left to die." — Henry Wood Nevinson, read by Sebastian Walker

"...What brings on anemia? Unhappiness, he said." — Henry Wood Nevinson, read by Sebastian Walker

"...the islands of Sao Tome and Principe have been rendered about the most profitable bits of the Earth's surface, and England and America can get their chocolate and cocoa cheap." — Henry Wood Nevinson, read by Sebastian Walker

"If this is not slavery, I know of no word in the English language that correctly characterized it." — from Cadbury's own investigator's report, quoted by Ramtin Arablouei

"One farthing, which is one quarter of one penny." — Catherine Higgs

"If cocoa farmers are that crucial, how come we're so poor?" — Shadrack Frimpong

"I bet my last dollar the chances are that the cure for cancer is in the mind of ... a cocoa farmer's kid sitting somewhere. But because they never get opportunity ... all of us, we miss out." — Shadrack Frimpong

Rich Details and Trivia

• The episode opens not with history but with host Ramtin Arablouei making hot chocolate at home with his son Rumi, interspersed with nostalgic vintage ad soundbites for Nestlé and Swiss Miss instant cocoa — the industrial history is anchored in a very ordinary winter ritual.
• Carla Martin describes a cacao pod as shaped "roughly like a Nerf football," containing 30 to 40 seeds — the cacao beans themselves.
• The episode is structured in three parts with pointed titles: "The Money Tree" (cacao as currency and commodity), "Nevinson's Crusade" (the journalist who exposed slave labor), and "Amazing Grace" — a title that plays double duty, echoing the hymn and naming Shadrack's cousin Grace.
• "Cocoa" and "cacao" name the same crop; the episode uses them somewhat interchangeably depending on context (raw bean vs. processed product).
• Shadrack's father left Ghana for the first time in his life to attend his son's graduation in Pennsylvania — a short drive from Hershey, Pennsylvania. Tasting a whole chocolate bar for the first time, he told his son it "tastes different than the seed that we plant."
• Carla Martin traces her own awareness of cocoa's labor issues to living in Cabo Verde, off the coast of West Africa, where she met people who'd returned from cocoa work disabled by its intensity — and others whose family members never returned at all.

Cross-Domain Connections

The acquired (business history) domain holds a Tier 0 raw mirror, sources/acquired/2024-12-16_mars-inc-the-chocolate-story_en.md (Acquired podcast's "Mars Inc. (the chocolate story)," roughly 207,000 characters), which covers much of the same cocoa/chocolate industry and explicitly discusses the Cadbury company, including Forrest Mars sourcing chocolate from Cadbury in the UK. Its lens, though, is corporate strategy and brand competition — M&M's, Snickers, the Hershey-Mars rivalry — not the colonial labor ethics this episode centers on. That episode hasn't yet been extracted into an acquired Tier 1 page, so there's no object in the wiki to link to yet; if and when it is, Cadbury would be a natural connection point between the two, but for now this is only a possibility, not a link. Separately, acquired's Costco episode mentions cocoa futures prices as one lever Costco buyers use in price negotiations — a passing detail, not a substantive overlap.

Pages Worth Building

• cadbury — William Cadbury and the Cadbury company, spanning both this episode's colonial labor scandal and the corporate-competition narrative in acquired's (Tier 0) Mars Inc. mirror; worth an independent entity page, ideally cross-linked once that episode is extracted.
• encomienda-system — the forced-labor system Spain imposed across colonial Latin America, the root mechanism behind early cacao production and a generic-enough concept to recur across any future Throughline episode touching Latin American colonial history.
• henry-wood-nevinson — the investigative journalist who exposed slave labor in São Tomé and later became one of Britain's best-known WWI war correspondents; worth a standalone page under the broader theme of investigative journalism reshaping an industry.

Source · throughline