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Over the spanning nearly four centuries, the transatlantic slave trade saw 12.5 million Africans forcibly taken from their homelands to the Americas. A devastating 1.8 million of those individuals died during the voyage, enduring scarcely imaginable conditions of overcrowding, filth, and illness. Some took their own lives by leaping overboard, while others were callously thrown into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara weaves together two parallel narratives. The first chronicles a harrowing incident aboard the namesake slave ship—the deliberate murder of 132 enslaved Africans by its British crew. The second story explores how this event came to influence the ending of the Atlantic slave trade in 1807, thanks largely by the dedicated work of a dazzling array of committed campaigners. Among them was Olaudah Equiano, who authored one of the few surviving first-person accounts of the Middle Passage, calling it “a scene of horror almost inconceivable”.

Liverpool's Central Role

The tale begins in Liverpool, a port city that at the height of its prosperity was responsible for 40% of Europe's slave trafficking. Financing slavery was a highly profitable venture for everyone from the elites but also the working classes. One such investor, William Gregson, accumulated his wages from his trade, invested them into the slave trade, and rose to become a prominent citizen and even mayor. Gregson provided the funds for the slave ship The William, which set sail from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its cargo was loaded with commodities like tobacco, firearms, knives, and various “India goods” such as chintz and cowrie shells—the latter being a common currency in the acquisition of enslaved people.

The Capture of the Zorg

Concurrently, a Dutch slave vessel named the Zorg (later anglicized by the British as the Zong) had left the Netherlands. With Britain at war with the Dutch in late 1780, the Royal Navy granted British ships permission to seize Dutch ships at sea—a virtual license for piracy. The Zorg was soon taken by a British captain and anchored off the Gold Coast. Meanwhile, Captain Hanley, on a slaving expedition, took aboard a disgraced British governor named Robert Stubbs, who had been removed for corruption.

A Voyage into Hell

When Hanley reached Cape Coast Castle—a fortress with a vast slave dungeon beneath it—he assumed control of the captured Zorg. He proceeded to grossly overload it with captives, put a dozen of his own crew on board, and made Luke Collingwood, a ship's surgeon of questionable seamanship, its captain. In August 1781, the Zorg left Accra carrying 442 captives, 17 crew members, and one notorious passenger: the former governor, Robert Stubbs.

Kara is particularly skilled at using historical documents to vividly reconstruct the general hell of being transported on a slave ship.

The Zorg's journey was plagued with calamity. Dysentery ravaged the vessel, followed by scurvy. The captain succumbed to sickness, became delirious, 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, describes how the captives' skin was frequently rubbed raw to the bone from being packed on bare wood, their flesh pinched and torn between the planks.

A Calculated Atrocity

By late November 1781, the Zorg was miles from Jamaica and critically short on water. The crew made the decision to throw overboard a number of the enslaved Africans, who had already suffered through months of obscene conditions below deck. This unspeakable act was not motivated by preserving life—the Africans had pleaded to be spared, even without water rations—but by cold economic greed. Ship insurance policies did not cover deaths from natural causes, but they would pay for cargo discarded 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, including women and children, among them a baby born during the voyage.

Insurance and Injustice

Back in Liverpool, investor William Gregson was unhappy about the financial return on his investment. 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 took them to court and won a trial by jury, with his lawyers claiming 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 anonymous letter appeared in a prominent English newspaper. The author, who claimed to have been present the court proceedings, argued compellingly against slavery, citing the Zorg case as a prime example of its inherent evil. Olaudah Equiano read the letter and brought it to the activist Granville Sharp, who petitioned for a new trial. At the following hearing, the events on the Zorg were reviewed in forensic detail, exactly what the abolitionists had wanted.

A Sustained Campaign

In the spring of 1787, the founding members of the Society for Effecting the Abolition of the Slave Trade first met. Over the following years, they wrote letters, orated, lobbied tirelessly, and gathered evidence on the realities of the slave trade. “Their efforts,” Kara writes, “would lay a blueprint for the pursuit of social justice.” After years of setbacks, the Act for the Abolition of the Slave Trade was finally passed in 1807.

An Enduring Impact

The debate over who or what deserves credit for abolition is contentious. The Zorg's legacy, however, is visibly captured by J.M.W. Turner's famous painting, The Slave Ship, which was inspired by the events of 1781. While slavery has been widespread in human history, its abolition following a prolonged public movement was unprecedented, serving as an testament to the power of moral courage, the pen, and relentless determination.

Kara's Narrative Method

Unlike his other work—such as the Pulitzer finalist Cobalt Red—Kara has had to fill in certain lacunae in the available documentation. At times, imaginative flourishes contrast with scrupulously factual accounts, giving the book a slightly chimeric feel. Part thriller and part historical analysis, The Zorg ultimately manages to shedding light on one of history's darkest chapters, using compelling prose and documented fact to assemble a account that haunts the reader long after the final page.