Discussion on American Slavery

In Short

This volume transcribes a high-stakes, five-night public debate held in Glasgow in June 1836 between British abolitionist George Thompson and American Presbyterian minister Robert J. Breckinridge. Triggered by Thompson’s open challenge to American clergymen, the exchanges confront whether the United States is collectively guilty for human bondage and whether immediate emancipation or gradual colonization is the proper Christian path forward. Accompanying documents and editorial appendices round out the volume. It stands as an enduring primary record of transatlantic anti-slavery agitation, exposing how deeply nineteenth-century religious and national identities were fractured by the crusade to end chattel slavery.

The Story

The text opens with the public correspondence that set the stage for the Glasgow debate. Having issued a blanket challenge to any American minister to defend their nation's religious institutions against charges of complicity in slavery, British orator George Thompson finds an answer in Robert J. Breckinridge, a prominent Kentucky Presbyterian visiting Great Britain. The men agree to a structured, multi-night forum to address the moral character of American slavery, the conduct of American churches, and the viability of proposed remedies.

As the debate opens, Thompson launches a direct assault on the American republic and its religious bodies. He argues that slaveholding is inherently sinful, requiring immediate, unconditional abolition. Thompson cites official church assemblies supporting slaveholders, the suppressive actions of vigilance committees in Southern cities, and the rampant domestic trade in human beings to show that American Christianity is thoroughly compromised. In response, Breckinridge seeks to narrow the scope of national guilt. He contends that the federal government possesses no constitutional authority to abolish slavery within individual sovereign states, pointing out that twelve states have already eliminated or forbidden the institution. Breckinridge fiercely defends the personal integrity of Southern believers, warning that sweeping denunciations from foreign agitators only alienate moderate reformers and destroy the peace of the churches.

The debate then pivots to the contentious topic of the American Colonization Society. Breckinridge mounts a detailed defense of colonization, framing it as a practical, benevolent initiative championed by historic figures like Thomas Jefferson to establish free black communities on the West Coast of Africa, such as Liberia and Cape Palmas. He argues that returning free people of color to Africa offers them genuine liberty while spreading Christianity and civilization across the continent. Thompson counters with burning hostility, labeling colonization a cruel scheme designed by slaveholders to drain off free black populations, bolster the security of slave property, and appease troubled Northern consciences. He presents letters and testimony from African Americans—including prominent leader James Forten—demonstrating that free blacks overwhelmingly abhor colonization and prefer to remain in their native land.

In the final sessions, the clash degenerates into sharp personal exchanges and conflicting testimonies. Breckinridge accuses Thompson and his American allies, such as William Lloyd Garrison, of inciteful rhetoric that stirs up mobs, ruins moderate abolition efforts, and even encourages violent slave revolts. Thompson vigorously rebuts these allegations, asserting that abolitionists rely solely on moral suasion, prayer, and constitutional rights. The narrative closes with supplementary documents, including a harsh editorial appendix compiled by C. C. Burleigh that documents the harsh realities of African settlements and reiterates the immediate abolitionist manifesto.

How It Unfolds

The challenge accepted George Thompson publishes an open invitation in the London Patriot, daring any American clergyman to defend American churches against charges of supporting slavery. Robert J. Breckinridge accepts the challenge in writing, setting the time and location for a public debate in Glasgow, Scotland.

Assault on national guilt Thompson opens the proceedings by charging the United States as a nation with participating in a massive system of systemic robbery and oppression. He targets church bodies that cooperate with slaveholders, citing votes of thanks given to clergy by Southern vigilance committees.

Defense of the Federal system Breckinridge responds by distinguishing between the federal government and individual state laws, arguing that the nation as a whole cannot be held culpable for local state institutions. He highlights the gradual progress of freedom across northern and border states through legal, orderly channels.

Clash over African colonization The debate turns to the American Colonization Society, which Breckinridge defends as a venerable, Christian enterprise supported by historic statesmen. Thompson counters that the society is a deceptive tool of slaveholders, reading protests from free black citizens who refuse to be exiled to West Africa.

Rebuttal of extreme charges Breckinridge accuses abolitionist leaders of spreading incendiary doctrines that incite mob violence and polarize the American populace. Thompson defends his colleagues, denying accusations of promoting violent insurrection and upholding the principle that slaveholding is a direct violation of God's moral law.

The appendix and final documentation The printed volume concludes with an editorial appendix compiled by C. C. Burleigh, featuring letters from distressed colonists in Cape Palmas and official anti-slavery resolutions. This section reinforces Thompson's arguments against colonization and solidifies the immediate abolitionist stance.

The People

• George Thompson wants immediate, universal emancipation for all enslaved people in America and seeks to expose the moral complicity of the American church. Stood in his way are American legal defenses, colonization schemes, and clergymen who excuse slaveholders. Through the debate, he maintains a relentless, uncompromising moral stance, refusing to grant any quarter to gradualist concessions.
• Robert J. Breckinridge wants to defend the honor of American Christians, preserve the unity of the republic, and promote gradual, voluntary manumission paired with African colonization. Stood in his way are sweeping denunciations by foreign reformers, radical abolitionist rhetoric, and the complex constitutional structure of the United States. Over the five nights, he shifts from a measured defense of constitutional limits to sharp, personal counterattacks against abolitionist leadership.
• William Lloyd Garrison wants the total, immediate destruction of chattel slavery and absolute civil equality for black Americans. Stood in his way are pro-slavery mobs, colonization advocates, and hostile public opinion. Though not physically present in Glasgow, his controversial writings and uncompromising tactics serve as a central, polarizing focal point for both debaters.
• James Forten wants the abolition of slavery and full recognition of civil rights for free African Americans in their native American homeland. Stood in his way are colonization leaders attempting to remove free people of color to West Africa. His written testimonies forcefully reject foreign exile, supplying Thompson with vital evidence against the Colonization Society.

In Its Own Voice

"I charge America, 'as a nation,' with permitting within her boundaries a wide spread system, which my opponent has himself described as one of clear robbery, universal concubinage, horrid cruelty, and unilluminated ignorance."

George Thompson indicts the entire American republic for sanctioning the domestic slave trade and upholding institutionalized oppression.

"By the influence of gradualism alone, had the cause of freedom advanced steadily to this point, and every day rendered its ultimate triumph throughout the whole empire more and more probable."

Robert J. Breckinridge argues that legal, incremental reform historically freed twelve states without fracturing the nation.

"The foolish tale, that we would encourage amalgamation by intermarriage between the whites and blacks, though often refuted, as often re-appears."

An official declaration from the Massachusetts Anti-Slavery Society addresses popular prejudices used by opponents to discredit immediate abolitionists.

What It's Really About

Underneath the tactical arguments over constitutional authority and colonial settlements, the debate exposes a fundamental disagreement over moral accountability. Thompson argues from a universalist, prophetic position: because slaveholding is an absolute sin against God, any institution, church, or nation that tolerates it is completely corrupt and must repent immediately. Breckinridge represents a legalist, institutional perspective: he views progress through the lens of jurisdictional limits, constitutional compromises, and practical management of racial tensions. The text grapples with whether systemic injustice can be dismantled through patient, internal political processes or if it demands fierce, unyielding external moral denunciation. It ultimately measures the irreconcilable divide between those who prioritize immediate human rights and those who defend legal order and institutional unity.

Why Read It Today

This book appeals directly to readers fascinated by nineteenth-century history, political rhetoric, and the global history of anti-slavery movements. Rather than offering a smoothed-over summary, the transcribed text places you right in the hall alongside an agitated audience, letting you experience the arguments in their raw, original form. You witness two master rhetoricians utilizing every weapon in their arsenals—from biblical exegesis and constitutional analysis to personal attacks and emotional appeals.

Reading the debate requires some patience with the formal, high-flown oratorical conventions of the 1830s, as well as an understanding of period terminology surrounding race and politics. The speeches are long, filled with detailed references to regional American politics, denominational disputes, and forgotten organizational squabbles. Yet the core dynamic remains electric. The text illustrates how the debate over American slavery resonated across the Atlantic, forcing international audiences to confront the tragic contradiction at the heart of the American republic. What stays with the reader is the chilling realization of how deeply entrenched slavery was, and how early the rhetorical lines of the American Civil War were drawn.