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Over the spanning nearly four centuries, the Atlantic slave trafficking system resulted in 12.5 million Africans trafficked from their continent to the Americas. A staggering 1.8 million of those individuals died during the Middle Passage, enduring unfathomable conditions of overcrowding, filth, and disease. Many took their own lives by throwing themselves overboard, whereas others were callously thrown into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara weaves together two interconnected narratives. The first details a harrowing incident aboard the namesake slave ship—the deliberate murder of 132 captive individuals by its British crew. The second story explores 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 dazzling array of committed campaigners. Among them was Olaudah Equiano, who wrote one of the few surviving first-person accounts of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

The Roots in Liverpool

The account originates in Liverpool, a port city that at the peak of its prosperity was responsible for 40% of Europe's slave trade. Investing in slavery was a highly profitable venture for everyone from the wealthy to the common people. One such entrepreneur, William Gregson, accumulated his wages from rope-making, ploughed them into the slave trade, and rose to become a wealthy burgher and even mayor. Gregson provided the funds for the slave ship The William, which departed from Liverpool for West Africa in October 1780 under Captain Richard Hanley. Its cargo was filled with commodities like tobacco, firearms, knives, and so-called “India goods” such as chintz and cowrie shells—the shells 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 departed the Netherlands. With Britain declaring war on the Dutch in late 1780, the Royal Navy gave British ships permission to capture Dutch ships at sea—a de facto sanctioning of privateering. The Zorg was soon taken by a British captain and held off the Gold Coast. Meanwhile, Captain Hanley, on a slaving expedition, took aboard a fleeing British governor named Robert Stubbs, who had been expelled for graft.

The Nightmare Passage

When Hanley reached Cape Coast Castle—a fortress with a notorious slave dungeon beneath it—he took command of the captured Zorg. He proceeded to severely overcrowd it with enslaved people, placed 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 depraved passenger: the former governor, Robert Stubbs.

Kara is particularly skilled at using contemporaneous sources to bring to life the collective nightmare of being trafficked on a slave ship.

The Zorg's journey was plagued with calamity. Dysentery ravaged the vessel, followed by scurvy. The captain fell ill, 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, details how the captives' skin was frequently rubbed raw 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 critically short on water. The crew resolved to throw overboard a number of the enslaved Africans, who had already endured 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. Maritime insurance policies did not cover deaths from disease, but they did cover cargo jettisoned out of “necessity” for the ship's safety. Over several days, the crew drowned “those Africans who would be worth less at auction”—the infirm, the sick, including women and children, even 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 drowned captive—a substantial sum in today's money. The insurers declined 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.”

Catalyzing the Movement

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.” Just twelve days after the trial, an anonymous letter 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 inherent evil. Olaudah Equiano saw the letter and brought it to the activist Granville Sharp, who petitioned for a new trial. At the subsequent hearing, the events on the Zorg were examined in meticulous detail, exactly what the abolitionists had wanted.

A Sustained Campaign

In the spring of 1787, the initial group of the Society for Effecting the Abolition of the Slave Trade convened. Over the following years, they wrote letters, orated, lobbied tirelessly, and meticulously documented 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.

A Lasting Legacy

The debate over who or what deserves credit for abolition is a matter of debate. The Zorg's influence, however, is powerfully evident in J.M.W. Turner's famous painting, The Slave Ship, which was inspired by the events of 1781. While slavery has been near-universal in human history, its abolition following a prolonged public movement was historic, serving as an testament to the power of persistent activism, the pen, and relentless 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 lacunae in the historical record. At times, speculative passages contrast with rigorously researched accounts, giving the book a somewhat hybrid feel. A blend of narrative suspense and part historical analysis, The Zorg nevertheless succeeds in illuminating 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.