Behind the Bastards

Part Three: X-Mas Special: The Heroes Who Ended The Slave Trade

December 25, 2025

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  • The abolitionist movement gained significant momentum following the *Gregson v. Gilbert* case, despite its limited immediate legal impact, primarily through the dedicated documentation and publicizing efforts of Granville Sharp. 
  • Thomas Clarkson's life trajectory was fundamentally altered by winning a Cambridge Latin essay contest on the lawfulness of slavery, leading him to abandon a clerical career to dedicate himself to abolition after being horrified by his research. 
  • The abolitionist cause in Britain was advanced by a multi-pronged strategy involving white allies like Granville Sharp and William Wilberforce, the direct political lobbying of formerly enslaved men like Olaudah Equiano (through the Sons of Africa), and the influential personal testimonies published by former slaves like Equiano and Ottobah Cuguano. 
  • The 1807 Act of Parliament, which immediately banned the Atlantic slave trade within the British Empire, was the culmination of decades of work by abolitionists like Granville Sharp and Thomas Clarkson, but it did not end slavery itself. 
  • The abolitionist cause experienced a temporary loss of momentum after the 1807 victory, but dedicated activists like Thomas Clarkson continued the fight, eventually leading to the abolition of slavery in the British Empire in 1833 and inspiring abolitionists in the United States. 
  • Thomas Clarkson's lifelong dedication to emancipation, spanning 60 years, is highlighted by his moving final meeting with Frederick Douglass, underscoring the direct link between the British abolitionist movement and later struggles for freedom in the Americas. 

Segments

Granville Sharp’s Post-Case Efforts
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(00:03:42)
  • Key Takeaway: Granville Sharp documented the Zong massacre details and demanded murder charges against the crew, warning God would damn the country if the slave trade continued.
  • Summary: Following the setback of Gregson v. Gilbert, Granville Sharp transcribed court notes and interviewed crew members to secure murder charges against the Zong perpetrators. Sharp sent a detailed document to the Lords of the Admiralty demanding an end to the slave trade, arguing its continuation would incur divine punishment upon the entire country. These initial efforts by Sharp to seek legal action were ignored by the Admiralty.
Peckard and Clarkson’s Introduction
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(00:06:08)
  • Key Takeaway: Reverend Peter Peckard was radicalized by Sharp’s documentation and used his position as Cambridge Vice Chancellor to set the Latin essay topic: ‘Is it lawful to make slaves of others against their will?’
  • Summary: Sharp’s correspondence reached Reverend Peter Peckard, who concluded the slave trade was a crime against humanity after reading Sharp’s collected evidence. Peckard, later Vice Chancellor of Cambridge, used this influence to frame the 1785 Latin essay contest topic around the morality of enslavement. This contest directly engaged Thomas Clarkson, who was preparing for a career as a reverend.
Clarkson’s Essay and Awakening
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(00:09:05)
  • Key Takeaway: Thomas Clarkson won the Cambridge essay contest after being horrified by Anthony Benezet’s writings, leading to a profound personal crisis where he resolved to dedicate his life to ending slavery.
  • Summary: Clarkson was deeply impacted by Anthony Benezet’s tract, Some Historical Account of Guinea, which detailed the horrors of the trade, causing him intense distress. His winning essay condemned the slave trade as impious and contrary to reason and divine law, citing the Zong massacre. While riding back to London, Clarkson experienced an awakening, concluding that if the facts were true, he must dedicate his life to ending the calamity.
Formation of the Abolition Society
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(00:17:15)
  • Key Takeaway: Sharp and Clarkson formed the Society for Effecting the Abolition of the Slave Trade to create a unified, mainstream organizing hub, forging alliances with figures like William Wilberforce.
  • Summary: The need for a central, non-Quaker-affiliated organization prompted the formation of the Society for Effecting the Abolition of the Slave Trade. This committee aimed to be a big tent, bringing in mainstream allies like Member of Parliament William Wilberforce to act as the movement’s parliamentary spokesperson. The society’s immediate goal was to gather evidence to prove the widespread evils of the trade, sending Clarkson on an investigative quest.
Testimonies from Former Slaves
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(00:20:09)
  • Key Takeaway: The publications of autobiographies by former slaves Ottobah Cuguano (1787) and Olaudah Equiano (1789) were crucial in dismantling pro-slavery myths by presenting Africans as literate, resourceful, and cultured heroes.
  • Summary: Ottobah Cuguano published his autobiography in 1787, influencing his friend Equiano to publish his own bestseller two years later, both translated into multiple languages. These firsthand accounts directly countered the prevailing myth that enslaved Africans were content or better off than in their homelands. Equiano and other freedmen formed the Sons of Africa to lobby the government directly, demonstrating strategic political participation despite lacking initial cultural influence.
John Newton’s Complicated History
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(00:28:40)
  • Key Takeaway: Former slave ship captain John Newton published Thoughts Upon the African Slave Trade (1788), detailing the pragmatic cruelty, sexual violence, and high mortality rates among both slaves and crews, which shocked Britons.
  • Summary: John Newton, a former slave ship captain who later became a reverend, published an account detailing the ferocity required to manage ships due to the constant threat of insurrection and profit motives. He described sailors being brutally whipped and the sexual abuse of enslaved women below deck. Newton’s testimony, combined with Clarkson’s research, provided powerful evidence against the trade just as Wilberforce was preparing legislation.
Clarkson’s Investigative Work and Propaganda
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(00:43:54)
  • Key Takeaway: Thomas Clarkson’s dangerous, on-the-ground investigation in port cities proved that the slave trade killed 20% of its own sailors, directly refuting the pro-slavery argument that it trained skilled naval personnel.
  • Summary: Clarkson gathered physical evidence, including shackles, and documented the appalling conditions for sailors, finding that 20% of the crew on slave ships died before returning. This research undermined the pro-slavery claim that the trade served as a vital training ground for the Royal Navy. Simultaneously, abolitionists used powerful visual propaganda, including Josiah Wedgwood’s ‘Am I not a man and a brother?’ seal and the diagram of the slave ship Brooks.
Early Legislative Setbacks and Haitian Influence
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(00:55:38)
  • Key Takeaway: Despite massive public support evidenced by 200 petitions, the 1792 bill to gradually abolish the slave trade passed the Commons but was blocked by the House of Lords, with subsequent war and sedition laws halting progress until 1806.
  • Summary: The success of the Haitian Rebellion in 1791 fueled abolitionist sentiment in England by demonstrating the inherent violence required to maintain slavery, leading to a successful sugar boycott by 300,000 people. William Wilberforce introduced a bill in 1792 that passed the Commons but was ultimately blocked by the House of Lords. War with France and anti-sedition laws further stalled the movement until 1806.
House of Lords Blocking Bill
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(00:57:49)
  • Key Takeaway: The House of Lords successfully blocked an anti-slavery bill, which the speakers characterize as containing a higher proportion of ‘assholes’ than the House of Commons.
  • Summary: A bill aimed at ending slavery was blocked by the House of Lords. The speakers humorously suggest the House of Lords has a higher concentration of objectionable members than the House of Commons. This obstruction caused a delay in the legislative progress of the abolitionist cause.
War Interrupts Abolition Efforts
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(00:58:11)
  • Key Takeaway: War with France starting in 1793, coupled with anti-sedition laws, significantly delayed the anti-slavery cause by making economic disruption undesirable and organizing difficult.
  • Summary: The outbreak of war with France in 1793 stalled the anti-slavery movement. The need to maintain imperial economics during wartime and the implementation of anti-sedition laws hampered abolitionist organizing efforts. Despite these delays, ongoing slave rebellions in the Caribbean kept the human cost of slavery in the public consciousness.
Abolition of Slave Trade Act
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(00:59:09)
  • Key Takeaway: The Abolition of the Slave Trade Act passed on March 25, 1807, immediately banning the trade and tasking the Royal Navy with searching for slave vessels, marking the beginning of the end for slavery in the empire.
  • Summary: The efforts of activists like Sharp, Clarkson, Equiano, and Newton culminated in the passage of the Abolition of the Slave Trade Act in 1807. This act immediately banned the Atlantic slave trade within the British Empire. While this was a major victory, it was not the end of slavery itself, which persisted until 1833.
Post-1807 Momentum and International Pressure
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(00:59:59)
  • Key Takeaway: The 1807 victory caused a loss of momentum among some abolitionists, but the most dedicated continued fighting and successfully pressured other European states to prohibit the slave trade.
  • Summary: Following the 1807 ban, some people felt the work was done, leading to a loss of momentum for the cause. Dedicated abolitionists, however, continued mobilizing and successfully convinced other European nations to sign on to prohibitions against the slave trade. Full abolition of slavery within the British Empire would not occur until 1833.
Legacy of Granville Sharp
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(01:01:36)
  • Key Takeaway: Granville Sharp, after 42 years of ceaseless work, lived to see the 1807 abolition of the slave trade and died in 1813 as one of the world’s most admired men.
  • Summary: Granville Sharp dedicated 42 years of his life to the abolitionist cause, seeing the 1807 ban on the slave trade before his death in 1813 at age 77. John Adams praised him, noting he merited the esteem of all who valued liberty and humanity. His work was foundational to the subsequent fight against slavery in the U.S.
Clarkson’s Continued Fight and Douglass Meeting
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(01:01:55)
  • Key Takeaway: Thomas Clarkson continued the fight after Sharp’s death, dedicating 60 years to emancipation, culminating in a deeply moving meeting with Frederick Douglass shortly before his own death.
  • Summary: Thomas Clarkson took up the mantle, continuing the fight through the general abolition of slavery in the empire and then focusing on the Americas. Clarkson gave the keynote speech at the 1840 World Anti-Slavery Convention, urging Americans to persevere. He met Frederick Douglass near the end of his life, stating he had given 60 years to the cause and would give 60 more if he had them.
Art and Hope in Abolition
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(01:02:24)
  • Key Takeaway: J.M.W. Turner’s painting, ‘Slavers Throwing Overboard the Dead and Dying,’ inspired by Clarkson’s writings and the Zorg incident, served as a powerful, affecting image for the 1840 World Anti-Slavery Convention.
  • Summary: The first World Anti-Slavery Convention was held in London in 1840. J.M.W. Turner created a painting for the event that depicted enslaved people being thrown overboard to die. This artwork was used to remind attendees of the inhumanity they were fighting against, drawing inspiration from the Zorg case.
Enduring Legacy of Activism
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(01:04:21)
  • Key Takeaway: The sustained, incremental efforts of early abolitionists like Equiano, Sharp, and Clarkson provided the direct inspiration and foundation for later movements, including women’s suffrage and the U.S. Civil Rights movement.
  • Summary: The long struggle of the early abolitionists, who fought for years with seemingly small gains, created a direct link to later social justice movements in the U.S. It would have been easy for them to give up given the immense human suffering continuing in the meantime. Their perseverance is presented as a source of hope for contemporary struggles.
Book Plug and Closing Remarks
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(01:06:06)
  • Key Takeaway: James Stout’s book, ‘Against the State,’ examines revolutionary struggles in Myanmar, Rojava, and Spain, offering readers hope through stories of liberation struggles.
  • Summary: James Stout promoted his book, ‘Against the State,’ which is available for preorder through AK Press. The book focuses on revolutionary struggles in Myanmar, Rojava, and Spain. The author hopes the book, like the podcast, leaves listeners feeling hopeful by sharing stories of young people fighting for liberation.