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Over the spanning nearly four hundred years, the transatlantic slave trade saw 12.5 million Africans forcibly taken from their homelands to the Americas. A devastating 1.8 million of those souls died during the Middle Passage, enduring unfathomable conditions of extreme confinement, squalor, and illness. Many chose to end their suffering by throwing themselves overboard, while still more were forcibly cast into the sea.

A Tale of Two Stories

In The Zorg, author Siddharth Kara presents two interconnected narratives. The first chronicles a horrific incident aboard the eponymous slave ship—the deliberate murder of 132 enslaved Africans by its British crew. The second story examines how this event played a pivotal role in the ending of the Atlantic slave trade in 1807, thanks largely by the relentless efforts of a coalition of abolitionist activists. Among them was Olaudah Equiano, who wrote one of the few surviving first-person narratives of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

Liverpool's Central Role

The tale originates in Liverpool, a port city that at the peak of its economic power was responsible for 40% of Europe's slave trade. Financing slavery was a lucrative venture for not just the wealthy but also the common people. One such investor, William Gregson, saved up his earnings from rope-making, ploughed them into the slave trade, and eventually became a prominent citizen and later mayor. Gregson financed the slave ship The William, which departed from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its hold was filled with trade goods like tobacco, firearms, knives, and so-called “India goods” such as chintz and cowrie shells—the latter being a standard rate in the purchase of enslaved people.

A Ship Seized

Concurrently, a Dutch slave vessel named the Zorg (later anglicized by the British as the Zong) had departed the Netherlands. With Britain at war with the Dutch in late 1780, the Royal Navy granted British ships permission to capture Dutch ships at sea—a de facto sanctioning of privateering. The Zorg was subsequently captured by a British captain and anchored off the Gold Coast. Meanwhile, Captain Hanley, during one of his voyages, picked up a disgraced British governor named Robert Stubbs, who had been removed for graft.

A Voyage into Hell

When Hanley arrived at Cape Coast Castle—a stronghold with a vast holding cell beneath it—he assumed control of the captured Zorg. He then severely overcrowd it with enslaved people, put a dozen of his own crew on board, and appointed Luke Collingwood, a ship's surgeon of dubious nautical skill, its captain. In August 1781, the Zorg finally left Accra carrying 442 enslaved Africans, 17 crew members, and one depraved passenger: the former governor, Robert Stubbs.

Kara excels in using contemporaneous sources to vividly reconstruct the general hell of being trafficked on a slave ship.

The Zorg's journey was fraught with calamity. "The flux" swept through the vessel, followed by scurvy. The captain fell ill, lost his senses, and handed command over to Stubbs. Thus, “a ship full of decay and death was being commanded by a passenger.” Kara masterfully utilizes eyewitness accounts to paint a picture of the unmitigated terror. The powerful testimony of Alexander Falconbridge, a doctor who became an activist, details how the captives' skin was frequently worn down to the bone from lying on bare wood, their flesh pinched and torn between the planks.

The Unspeakable Decision

By late November 1781, the Zorg was still miles from Jamaica and dangerously short on water. The crew made the decision to jettison a number of the enslaved Africans, who had already endured months of obscene conditions below deck. This monstrous act was not motivated by ensuring survival—the Africans had begged to be spared, even without water rations—but by cold economic greed. Ship insurance policies did not cover losses from disease, but they would pay for cargo jettisoned out of “necessity” for the ship's safety. Over several days, the crew murdered “those Africans who would be worth less at auction”—the infirm, the sick, along with women and children, even a baby born during the voyage.

The Courtroom Battle

Back in Liverpool, investor William Gregson was dissatisfied with the profit on his venture. He submitted an insurance claim for £30 per lost slave—a substantial sum in today's money. The insurers refused to pay. In March 1783, Gregson sued and won a trial by jury, with his lawyers arguing that throwing the enslaved people overboard had been “necessary.”

The Spark for Abolition

According to Kara, “there is a direct line of causality between the public exposure of the Zorg murders and the first movement to abolish slavery in England.” Merely twelve days after the trial, an published essay appeared in a widely read English newspaper. The author, who claimed to have been present the court proceedings, made a powerful case against slavery, citing the Zorg case as a prime example of its brutality. Olaudah Equiano read the letter and took it to the activist Granville Sharp, who petitioned for a new trial. At the following hearing, the events on the Zorg were reviewed in meticulous detail, precisely what the abolitionists had hoped for.

The Road to 1807

In the spring of 1787, the initial group of the Society for Effecting the Abolition of the Slave Trade first met. Over the following years, they wrote letters, made speeches, lobbied tirelessly, and gathered evidence on the particulars of the slave trade. “Their efforts,” Kara writes, “would lay a blueprint for the pursuit of social justice.” After years of struggles, the Act for the Abolition of the Slave Trade was enacted in 1807.

An Enduring Impact

The question of who or what deserves credit for abolition remains a matter of debate. The Zorg's influence, however, is powerfully captured by J.M.W. Turner's famous painting, The Slave Ship, which was based on the events of 1781. While slavery has been near-universal in human history, its abolition following a prolonged mass campaign was unprecedented, serving as an affirmation to the power of persistent activism, the pen, and unwavering persistence.

The Author's Approach

In contrast to his previous books—such as the Pulitzer finalist Cobalt Red—Kara has had to fill in certain gaps in the historical record. At times, imaginative flourishes sit awkwardly next to rigorously researched accounts, giving the book a slightly hybrid feel. A blend of narrative suspense and part historical analysis, The Zorg ultimately succeeds in illuminating one of history's most horrific episodes, using powerful storytelling and meticulous research to create a portrait that haunts the reader long after the final page.