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Over the spanning nearly four hundred years, the Atlantic slave trafficking system saw 12.5 million Africans forcibly taken from their homelands to the Americas. A devastating 1.8 million of those individuals perished during the voyage, enduring scarcely imaginable conditions of overcrowding, filth, and illness. Some chose to end their suffering by throwing themselves overboard, while still more were callously thrown into the sea.

Two Interwoven Narratives

In The Zorg, author Siddharth Kara weaves together two parallel narratives. The first details a horrific incident aboard the namesake slave ship—the deliberate murder of 132 captive individuals by its British crew. The second story explores how this atrocity came to influence the ending of the Atlantic slave trade in 1807, driven in large part by the relentless efforts of a dazzling array of abolitionist activists. Among them was Olaudah Equiano, who authored one of the rare first-person accounts of the Middle Passage, describing it as “a scene of horror almost inconceivable”.

The Roots in Liverpool

The tale begins in Liverpool, a port city that at the peak of its prosperity was responsible for 40% of Europe's slave trafficking. Investing in slavery was a lucrative venture for everyone from the wealthy to the common people. One such investor, William Gregson, accumulated his earnings from his trade, ploughed them into the slave trade, and rose to become 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 commodities like tobacco, firearms, knives, and various “India goods” such as chintz and cowrie shells—the latter being a standard rate in the purchase of human beings.

A Ship Seized

Around the same time, a Dutch slave vessel named the Zorg (later referred to by the British as the Zong) had departed the Netherlands. With Britain declaring war on the Dutch in late 1780, the Royal Navy granted British ships authority to seize Dutch ships at sea—a virtual license for piracy. The Zorg was soon captured by a British captain and anchored off the Gold Coast. Meanwhile, Captain Hanley, on a slaving expedition, picked up a fleeing British governor named Robert Stubbs, who had been expelled for graft.

The Nightmare Passage

When Hanley reached Cape Coast Castle—a stronghold with a notorious slave dungeon beneath it—he took command 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 nautical skill, its captain. In August 1781, the Zorg finally left Accra carrying 442 captives, 17 crew members, and one notorious passenger: the former governor, Robert Stubbs.

Kara excels in using historical documents to bring to life the collective nightmare of being trafficked on a slave ship.

The Zorg's journey was fraught with calamity. Dysentery ravaged the vessel, and then scurvy. The captain fell ill, became delirious, and appointed Stubbs. Thus, “a ship full of decay and death was being commanded by a passenger.” Kara effectively employs period testimonies to illustrate 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.

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 unspeakable act was not motivated by ensuring survival—the Africans had pleaded to be allowed to live, even without water rations—but by cold economic greed. Ship insurance policies did not cover losses from natural causes, but they would pay for cargo discarded out of “necessity” for the ship's safety. Over a period of 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.

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 considerable sum in today's money. The insurers declined to pay. In March 1783, Gregson sued and was awarded a trial by jury, with his lawyers arguing 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 published essay appeared in a prominent English newspaper. The author, who claimed to have attended the court proceedings, made a powerful case against slavery, using 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 filed a motion for a new trial. At the subsequent hearing, the events on the Zorg were reviewed in meticulous detail, exactly what the abolitionists had hoped for.

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 subsequent years, they petitioned, 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 struggles, 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 remains a matter of debate. The Zorg's influence, 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 near-universal in human history, its abolition following a prolonged mass campaign was historic, serving as an affirmation to the power of persistent activism, the pen, and relentless determination.

The Author's Approach

In contrast to his other work—such as the acclaimed Cobalt Red—Kara has had to fill in certain gaps in the historical record. At times, speculative passages contrast with scrupulously factual accounts, giving the book a slightly chimeric feel. A blend of narrative suspense and part historical analysis, The Zorg nevertheless manages to illuminating one of history's most horrific episodes, using powerful storytelling and documented fact to create a account that haunts the reader well after the final page.