Author：Sergey He, George School (PA)
Top Image: Joseph Mallord William Turner, Slave Ship (Slavers Throwing Overboard the Dead and Dying, Typhoon Coming On), 1840 (Museum of Fine Arts, Boston)
From the 16th to the 19th centuries, at least 9.57 million enslaved Africans were forcibly displaced across the Atlantic in one of history’s greatest human rights catastrophes—the transatlantic slave trade. In the midst of this abysmal chapter, William Wilberforce, an English abolitionist and politician, emerged as a central figure who, through tireless advocacy against slavery, reshaped the moral and political constructs of human freedom. Wilberforce used a shrewd combination of moral values, parliamentary position, and popular support. In doing so, Wilberforce propelled the abolition of the British slave trade and became a model for future human rights movements globally. While his contemporaries played valuable roles, Wilberforce’s framework uniquely broadened human freedom on a global scale.
The transatlantic slave trade served as a sustainable and steady source of wealth and power of European empires, particularly Great Britain, whose national prosperity relied on colonial commerce and slave-based plantation economies. By the late 18th century, slavery was both socially normalized due to racial ideologies and entangled economically within Britain’s imperial development. Amidst this oppressive reality, however, the Enlightenment began to transform concepts of liberty and equality into concrete political actions. The American (1776), French (1789), and Haitian (1791) revolutions unleashed unprecedented social reforms on institutions associated with slavery. Although these revolutions did not guarantee success for abolitionist arguments in Britain, they created possibilities.
Initially, British opposition to slavery was driven by moral arguments and religious beliefs from groups such as the Quakers and evangelicals—particularly the Testonites, who were important in early activism. They raised public awareness about the transatlantic slave trade as “moral storytellers,” but lacked the parliamentary and political expertise to create change through legislative effort. William Wilberforce came to this moment of opportunity with the precise background to connect grassroots moral impetus and activism with the machinery of political power. He recognized early on that an advocate with political influence like himself would play a pivotal role in the movement, “the cause wants not truth, but a voice within those walls where power resides.” Wilberforce took the cues from early activists to reframe the abolitionist movement into a political movement. This major shift—turning moral outrage into an actionable parliamentary motion—formed the groundwork for modern human rights activism. While Wilberforce did share the moral standards of his contemporaries, it was his unique experience and “calling” within the present power system that allowed him to leverage his activism.
Wilberforce’s evangelical conversion in 1785 marked the moment when moral advocacy, previously associated with groups like the Quakers, shifted toward politically effective abolition of slavery. Earlier activists, such as the Testonites, had utilized moral persuasion through storytelling to expose the horrors of the slave trade; however, working from outside Parliament, they were limited by not tapping into the world of power. Although raised in an Anglican family like most of the British families, Wilberforce was inspired by his evangelical aunt and uncle and eventually embraced evangelicalism himself; he was operating from a unique institutional position in their movements. Also, Wilberforce came to consider his role within Parliament as an assignment from God for moral reform. The potential for abolition at this point was very different from previous movements aimed at moral reform, it had become a political priority.
This shift was best exemplified in his 1792 declaration to Hannah More, closely connected with Wilberforce, who was also part of the Clapham Sect, a group of evangelical Christians who opposed slavery: “Let us not despair; it is a blessed cause, and success, ere long, will crown our exertions. Already we have gained one victory; we have obtained, for these poor creatures, the recognition of their human nature, which… is no small step” (Wilberforce, 2011). In this theological assertion on the humanity of enslaved Africans, Wilberforce made the underlying meaning of his activism clear—congruence with Christian faith—as the centerpiece for their political discourse. Wilberforce held credibility with the establishment which allowed him to build coalitions among the politically involved, in contrast to Quaker’s role of outsider. Wilberforce was intent on taking the religious fervor of evangelicals and turning it into policy. Where moral persuasion alone had failed, he stepped into the space in between—leveraging both grassroots momentum of abolitionists and the machinery of state power.
When William Wilberforce became involved in politics under the sponsorship of influential politician William Pitt in 1780, he took advantage of a political landscape in which his moral vision could now become a real opportunity. Wilberforce’s brilliance, however, lay not in working alone, but in forging partnership with allies for good purposes. When Quaker abolitionists Joseph Woods and William Dillwyn established the Society for Effecting the Abolition of the Slave Trade (SEAST) in 1787, they confronted a parliamentary system that excluded their voices by definition. Wilberforce, an Anglican insider statutorily equipped to straddle both sides of the sectarian divide, was able to unite disparate factions: the marginalized Quakers, evangelical Anglicans of the Clapham Sect, and the reform-minded Whigs and Tories. This alliance converted popular moral passion into political capital. Wilberforce’s partnership with Thomas Clarkson, an early founder of the Committee for the Abolition of the Slave Trade, exemplified his collaborative strategy. Clarkson’s written visceral evidence of the horrors of the slave ship served as evidence for Wilberforce to use in Parliamentary debates. Wilberforce provided a metaphor when he acknowledged to Clarkson that, “Your exertions have furnished me with the necessary weapons; it remains for me to wield them in the House” (Wilberforce, 2011). Through these alliances Wilberforce was able to turn moral conviction into legislative action, and demonstrate how systemic change was possible when activism from below and political action from above came together.
With the addition from Clarkson’s reputation and influence among the crowds, an unprecedented mass mobilization strategy emerged. Activists like Clarkson and the Quaker network worked to enhance public awareness through pamphlets, lectures, and petition campaigns across the country. According to research conducted by Hannah Jones, “petitions were sent in to parliament, eventually adding up to between 60,000 and 100,000 signatures (the largest petition drive Britain had seen)… from elite merchants to farmers to intellectuals to sailors to religious leaders signed petitions. Women were also very involved…” (Jones, 2010). This unanimous action was greatly appreciated due to its unprecedentedness and diversity of the petitioners. British citizens had demonstrated unity that was rarely observed throughout its history. Wilberforce excelled at serving as the essential communication bridge between all this moral outrage and the halls of power in Parliament. He harnessed the “moral urgency” that many ordinary Britons felt on the street and turned it into a legislative force of action. In his first speech on abolition to Parliament in 1789, he stated that the petitions being submitted to Parliament were proof of the public will: “I must confess … with a degree of fear and anxiety… But I derive confidence from the support of the public opinion… the numerous petitions which have been presented… are strong proofs of the general wish of the nation” (Wilberforce, 2024). He explicitly framed his role in Parliament as one of carrying out public will, by saying, “I mean not to accuse anyone … I trust every member of this House… will be prepared … to account for the deeds done in the body” (Wilberforce, 2024). This rhetoric of solidarity positioned him not only as a public representative but as the public’s confessor and what, in effect, served as Parliament’s moral agent.
As the French and Haitian Revolutions profoundly changed the Atlantic world, Wilberforce was pursuing a quieter but comparable revolutionary experiment in the Sierra Leone colony (1792). He envisioned the Sierra Leone project as an alternative to slavery for Black Loyalists—and for Africans freed from enslaved voyages—and based it on his aspirational conviction that freedom requires not only external means of emancipation, but also moral and spiritual transformation. Wilberforce benefited from the Quaker community’s local and grassroots support, but in terms of securing the colony the legitimacy and support required from Parliament, it was Wilberforce himself who demonstrated how civic activism could achieve something greater through the overly pragmatic institutions of the state. However, it was also in this context that Wilberforce’s limitations became most evident. While deeply committed to the belief that Christianity was a liberating force, he held paternalistic assumptions about the practices of the Obeah tradition and framed African traditions as in need of Western religious intervention in a broader narrative of “civilization” of freedom. He conveyed this messianic zeal to Hannah More when he remarked, “Christianity is the only effectual cure of the world’s moral disorders… the renovating principle which alone can heal the wounds of humanity.” There is a tension here that reveals the contradiction of his abolitionism: although he possessed a commitment to an ideal of universal human dignity, he was still constrained by the limits of the colonial worldview. Nonetheless, his beliefs represented an advance at the same time, because even within the limitations of paternalistic colonialism, Wilberforce showed that liberated Africans deserved autonomous spaces as an alternative to servitude and cultural erasure.
Wilberforce’s approach fundamentally differed from that of radical revolutionaries like Robespierre or public activists like Olaudah Equiano. He neither positioned himself to overthrow the state nor simply relied on public testimony and moral outrage—though he did use both. Instead, he mounted an organized, directed campaign over decades, often against many odds, within the British parliamentary system. He knew that lasting abolition required legislation, institutions, and political endorsement; “we have no hope but from Parliament,” he wrote (Wilberforce, 2011). His extraordinary gift was his ability to build and hold regional, national, and even international coalitions: every year, he reintroduced bills to abolish the slave trade, even after long and intense opposition from powerful West Indian interests had resulted in repeated failures. He became known for being “invincible,” enthused by a deep belief in the cause and confidence in its eventual succeed. After a particularly discouraging setback, he said: “The cause is of God, and must prevail, though we may be called to wait” (Wilberforce, 2011).
Finally, in 1807, as a result of the hard work by Wilberforce and his alliance the political climate shifted. The Slave Trade Act was implemented at the end of 1807, which abolished the slave trade within the British Empire. Wilberforce made possible the enlargement of freedom through principled, perpetual engagement with institutions where he found himself—a promotion of achieving radical aims through a reformist approach sustained throughout his life, that also included encouraging a very significant international co-operation. His triumph showed that it was possible to achieve fundamental change without a violent revolution. His success was built upon his persistence, exemplified how he continued to work beyond 1807; in a letter to William Hey in 1814, he remained focused on the international struggle against slavery and the task of mobilizing political sentiment abroad: “I hear rather favourable accounts from Paris about the disposition of people in high stations towards the Abolition; but the mercantile world are intent on gain, the profligacy of manners and morals great…” (Wilberforce, 2011). He understood that the slave trade was a transnational system necessitating a transnational response and had nurtured his links with French abolitionists, like members of the Society of the Friends of the Blacks. He knew Britain’s 1807 victory could be a template, and his correspondence, like Hey’s letter in 1814, reflects the collective activity he was animating, in which he shared strategies, information, and moral support to French elites, hoping they could follow the British example.
This synergistic model of linking organized public advocacy with disciplined parliamentary intervention, and William Wilberforce’s consistent devotion were his greatest contributions towards enlarging human freedom. It provided a precedent for nonviolent, advocacy-based human rights campaigns. From transatlantic anti-slavery movements, to 20th-century civil rights movements and contemporary international NGOs, Wilberforce showed that sustained moral commitment, directed towards civic action and institutional strategies, could, within a democratic construct, dismantle historically entrenched injustices and provide an alternative to revolutionary action.
References
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(Edited by Peter Tian, Operations Office of UHHC. Images sourced from the internet; All rights reserved by the author, Sergey He，This article is adapted from the author’s submission to the John Locke Essay Competition, responding to the History Question 3 prompt: “Which figure in history did most to enlarge human freedom?）