Which Party Started Slavery? The Truth Behind America’s Foundational Injustice — Debunking 5 Dangerous Myths That Still Shape Politics Today

By lisa-anderson · April 18, 2024

Why This Question Matters More Than Ever

The question which party started slavery surges in search volume during election cycles, school curriculum debates, and national reckonings with racial injustice — yet it reflects a profound historical misunderstanding that obscures accountability and distorts civic education. Slavery was not launched by a political party; it was codified by British colonial governments, entrenched by state legislatures before any national parties existed, and sustained for generations across partisan lines. Understanding this timeline isn’t academic nitpicking — it’s essential to dismantling disinformation, honoring enslaved people’s resistance, and building policies rooted in truth rather than political scapegoating.

Slavery Existed Long Before Any U.S. Political Party

Chattel slavery in what would become the United States began in 1619, when approximately 20–30 enslaved Africans arrived in English-occupied Virginia aboard the ship White Lion. At that time, there were no political parties — not even a unified American government. The British Crown governed the colonies directly through royal charters and appointed governors. The first formal legal codification of hereditary, race-based slavery occurred in Virginia in 1661 (enslaved status passed through the mother) and solidified in the Virginia Slave Codes of 1705, which stripped Black people of legal personhood, banned interracial marriage, and criminalized literacy and assembly.

By contrast, the first organized U.S. political parties emerged decades later: the Federalist Party coalesced around Alexander Hamilton and John Adams in the mid-1780s, while the Democratic-Republican Party formed under Thomas Jefferson and James Madison in 1792 — nearly 180 years after slavery’s institutional launch in English North America. Neither party ‘started’ slavery; both inherited, defended, and expanded it. Jefferson — author of the Declaration of Independence — owned over 600 enslaved people and drafted legislation protecting slaveholders’ rights. John Adams opposed slavery personally but refused to challenge it politically, fearing dissolution of the fragile union.

How Both Major Parties Later Enabled and Profited From Slavery

Once parties formed, their stances evolved — but never toward abolition as a founding principle. The Democratic-Republican Party (precursor to today’s Democratic Party) dominated Southern politics and built its power base on plantation economies. Its leaders — including Andrew Jackson, who forcibly removed Indigenous nations to expand cotton plantations worked by enslaved labor — openly championed slavery as ‘a positive good.’ Meanwhile, early Whigs and later Republicans included both ardent abolitionists (like Frederick Douglass, who advised Lincoln) and pro-compromise figures (like Henry Clay, architect of the Missouri Compromise). The Republican Party, founded in 1854, opposed the expansion of slavery into new territories — not its existence where already entrenched. Lincoln’s 1860 platform pledged not to interfere with slavery in states where it existed, prioritizing preservation of the Union.

A telling case study: the 1850 Fugitive Slave Act. Passed under Democratic President Millard Fillmore (a Whig who succeeded a Democrat), it required citizens in free states to assist in capturing freedom seekers — and was enforced by federal marshals appointed by both Whig and Democratic administrations. Abolitionist resistance surged in response, galvanizing the nascent Republican coalition. Yet even after the Civil War, both parties participated in Reconstruction’s betrayal: Democrats waged violent campaigns (e.g., the 1874 Colfax Massacre) to overthrow biracial governments, while Northern Republicans abandoned federal enforcement by 1877, enabling Jim Crow.

The Real Architects: Colonial Legislatures, Royal Charters, and Economic Systems

If we seek true accountability for slavery’s institutional launch, we must look beyond parties to the structures that created and sustained it:

The Royal African Company (1672–1752): Chartered by King Charles II, this British monopoly shipped over 150,000 enslaved Africans to English colonies — including 84,000 to Jamaica and Barbados, whose sugar profits directly funded Virginia and South Carolina’s tobacco and rice economies.
Colonial Assemblies: Virginia’s House of Burgesses (founded 1619) passed the first slave codes. South Carolina’s 1712 Slave Code — modeled on Barbados’ brutal 1661 law — defined enslaved people as property, authorized torture for ‘insubordination,’ and forbade teaching reading.
Transatlantic Capital Networks: Boston merchants financed slave ships; Rhode Island distilleries produced rum traded for captives in West Africa; New York banks insured slave ships and held mortgages on plantations. A 2023 Brown University study traced $1.2 billion (in today’s dollars) in direct investments from Northern financial institutions into slavery-linked enterprises between 1790–1860.

These weren’t partisan projects — they were systemic, cross-regional, and legally sanctioned by monarchies and colonial charters long before ‘Democrat’ or ‘Republican’ meant anything in American politics.

What the Data Shows: Party Affiliation vs. Pro-Slavery Legislation

Historical voting records reveal bipartisan support for slavery’s legal architecture. Below is a comparison of key pro-slavery federal actions and the party affiliations of their chief sponsors and supporters — illustrating how deeply embedded slavery was across ideological lines before the Civil War.

Legislation / Event	Year	Dominant Sponsoring Party	Bipartisan Support (% Voting Yea)	Key Impact
Fugitive Slave Act (part of Compromise of 1850)	1850	Whig (Henry Clay) & Democratic (Stephen Douglas)	Whigs: 78% \| Democrats: 89%	Mandated citizen participation in capturing freedom seekers; denied accused persons jury trials
Kansas-Nebraska Act	1854	Democratic (Stephen Douglas)	Democrats: 97% \| Whigs: 56% \| Free Soilers: 0%	Repealed Missouri Compromise; allowed slavery in new territories via ‘popular sovereignty’
Dred Scott Decision (upheld by Congress)	1857	N/A (Supreme Court), but Congress declined to overturn	Both parties failed to pass corrective legislation; Democrats controlled Senate (1857–1861)	Ruled Black people had ‘no rights which the white man was bound to respect’; invalidated all federal slavery restrictions
13th Amendment (Abolition)	1865	Republican (Lincoln)	Republicans: 100% \| Democrats: 23% (House); 0% (Senate)	First constitutional ban on slavery — passed only after wartime emergency powers and mass enlistment of Black troops shifted political calculus

Frequently Asked Questions

Did the Democratic Party start slavery?

No — the Democratic Party was founded in 1828, over 200 years after slavery began in English colonies. While many early Democratic leaders (like Andrew Jackson and Jefferson Davis) were enslavers and defenders of slavery, the institution predated the party by centuries and was upheld by multiple colonial and federal governments across party lines.

Was the Republican Party anti-slavery from the beginning?

The Republican Party opposed the expansion of slavery into western territories — not its existence in Southern states. Its 1856 platform called slavery ‘a relic of barbarism,’ but its 1860 platform explicitly promised not to interfere with slavery where it existed. The party’s anti-slavery stance evolved rapidly during the Civil War, culminating in support for the 13th Amendment.

What role did Northern states and businesses play in slavery?

Crucial and complicit. Northern ports launched 70% of all U.S. slave voyages. Banks in Boston, New York, and Philadelphia financed plantations and insured slave ships. Textile mills in Lowell and Manchester processed slave-grown cotton. Even after Northern states abolished slavery (between 1777–1804), their economies remained deeply entwined with the slave system — a reality documented in the 2006 Brown University Slavery and Justice Report.

Why do politicians still use ‘which party started slavery’ as a talking point?

Because it’s a potent, emotionally charged simplification that deflects from systemic analysis. Blaming one modern party erases the roles of colonial powers, economic elites, religious institutions, and ordinary citizens who benefited — allowing contemporary actors to position themselves as inheritors of moral clarity rather than participants in ongoing legacies of inequality.

How can educators teach this history accurately?

Center primary sources: slave narratives (e.g., Olaudah Equiano, Harriet Jacobs), colonial court records, shipping manifests, and legislative debates. Avoid framing slavery as a ‘sectional conflict’ — emphasize its national foundations and economic interdependence. Use timelines showing slavery’s evolution alongside party formation, and highlight resistance: maroon communities, the Haitian Revolution’s influence, and Black-led abolitionist networks like the Underground Railroad.

Common Myths

Myth #1: ‘The Democratic Party created slavery to oppress Black people.’
Reality: Slavery was established under British monarchy and colonial charters — the Democratic Party didn’t exist until 1828. Its early leaders inherited and defended the system, but they did not originate it.

Myth #2: ‘Republicans freed the slaves single-handedly.’
Reality: Enslaved people liberated themselves through rebellion, escape, and wartime service. Over 180,000 Black soldiers served in the Union Army — forcing Lincoln’s hand on emancipation. Congressional passage of the 13th Amendment required bipartisan negotiation and relied on border-state Democrats’ eventual support.

Conclusion & CTA

Asking which party started slavery misdirects our moral inquiry — away from the transatlantic systems, colonial laws, and capitalist imperatives that birthed racialized chattel slavery, and toward modern partisan blame games. Truth-telling begins with precision: name the Royal African Company, cite the 1705 Virginia Slave Codes, acknowledge Northern complicity, and uplift enslaved people’s relentless resistance. If you’re an educator, parent, or community leader, download our free Colonial Slavery Timeline Kit — complete with primary source excerpts, discussion prompts, and map overlays showing slave trade routes and port economies. History doesn’t absolve — but understanding it correctly is the first act of repair.