David Wilmot (1814-1868) U.S. politician from Pennsylvania. One of the founders of the Republican Party; U.S. Senator 1861-1863.

Gettysburg Battlefield National Park, Gettysburg, Pennsylvania.

The Anti-Slavery Passage Deleted from the Declaration of Independence

Thomas Jefferson. (Credit: VCG Wilson/Corbis via Getty Images)

These fugitive slaves are fleeing from Maryland to Delaware by way of the Underground Railroad.These fugitive slaves are fleeing from Maryland to Delaware by way of the Underground Railroad, 1850. (Photo by: Universal History Archive/Universal Images Group via Getty Images)

Press room of the Planet newspaper, Richmond, Virginia, circa 1899.

<p>Slavery was widely practiced throughout the ancient world, and in the American colonies in the 17th and 18th centuries, which helped propel the United States into the Civil War.</p>


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<strong>Slavery in Plantations and Cities</strong>

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Slavery is a central paradox of much of American history. In fact, most of the country's founding fathers owned slaves.

Slavery and the Presidency

history/video

In the 17th and 18th centuries, enslaved Africans worked mainly on the tobacco, rice and indigo plantations of the southern coast, from the Chesapeake Bay colonies of Maryland and Virginia south to Georgia. Starting 1662, the colony of Virginia and then other English colonies established that the legal status of a slave was inherited through the mother. As a result, the children of enslaved women legally became slaves.

Before the rise of the<a href="https://www.history.com/topics/american-revolution"> American Revolution</a>, the first debates to abolish slavery emerged. Black and white abolitionists contributed to the enactment of new legislation gradually abolishing slavery in some northern states such as Vermont and Pennsylvania. However, these laws emancipated only the newly born children of enslaved women.

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But after the end of the<a href="https://www.history.com/topics/american-revolution/american-revolution-history"> American Revolutionary War</a>, slavery was maintained in the new states. The new U.S.<a href="https://www.history.com/topics/constitution"> Constitution</a> tacitly acknowledged the institution of slavery, when it determined that<a href="https://www.history.com/news/the-history-of-the-electoral-college-debate"> three out of every five</a> enslaved people were counted when determining a state's total population for the purposes of taxation and representation in Congress.

Throughout the 17th and 18th centuries, European and American slave merchants purchased enslaved Africans who were transported to the Americas and forced into slavery in the American colonies and exploited to work in the production of crops such as tobacco, wheat, indigo, rice, sugar, and cotton. Enslaved men and women also performed work in northern cities such as Boston and New York, and in southern cities such as Charleston, Richmond, and Baltimore. 

By the mid-19th century, America’s <a href="https://www.history.com/topics/westward-expansion/westward-expansion">westward expansion</a> and the <a href="https://www.history.com/topics/black-history/abolitionist-movement">abolition</a> movement provoked a great debate over slavery that would tear the nation apart in the bloody <a href="https://www.history.com/topics/american-civil-war/american-civil-war-history">Civil War</a>. Though the Union victory freed the nation’s four million enslaved people, the legacy of slavery continued to influence American history, from the <a href="https://www.history.com/topics/american-civil-war/reconstruction">Reconstruction</a> to the <a href="https://www.history.com/topics/black-history/civil-rights-movement">civil rights movement</a> that emerged a century after <a href="https://www.history.com/topics/american-civil-war/emancipation-proclamation">emancipation</a> and beyond.

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America is at the brink of a Civil War as cotton spreads west and threatens to expand slavery into new territories.

Civil War Culture

In the late 18th century, the mechanization of the textile industry in England led to a huge demand for American cotton, a southern crop planted and harvested by enslaved people, but whose production was limited by the difficulty of removing the seeds from raw cotton fibers by hand.

But in 1793, a U.S.-born&nbsp; schoolteacher named <a href="http://www.history.com/topics/inventions/cotton-gin-and-eli-whitney">Eli Whitney invented the cotton gin</a>, a simple mechanized device that efficiently removed the seeds. His device was widely copied, and within a few years, the South transitioned from the large-scale production of tobacco to that of cotton, a switch that reinforced the region’s dependence on enslaved labor.

Slavery was never widespread in the North as it was in the South, but many northern businessmen grew rich on the slave trade and investments in southern plantations. Although gradual abolition emancipated newborns since the late 18th century, slavery was only abolished in New York in 1827, and in Connecticut in 1848.

Though the U.S. Congress outlawed the African slave trade in 1808, the domestic trade flourished, and the enslaved population in the United States nearly tripled over the next 50 years. By 1860 it had reached nearly 4 million, with more than half living in the cotton-producing states of the South.

Enslaved people in the antebellum South constituted about one-third of the southern population. Most lived on large plantations or small farms; many enslavers owned fewer than 50 enslaved people.

Landowners sought to make their enslaved completely dependent on them through a system of restrictive codes. They were usually prohibited from learning to read and write, and their behavior and movement were restricted.

Many enslavers raped women they held in slavery, and rewarded obedient behavior with favors, while rebellious enslaved people were brutally punished. A strict hierarchy among the enslaved (from privileged house workers and skilled artisans down to lowly field hands) helped keep them divided and less likely to organize against their enslavers.

Marriages between enslaved men and women had no legal basis, but many did marry and raise large families. Most owners of enslaved workers encouraged this practice, but nonetheless did not usually hesitate to divide families by sale or removal.

In 1619, the Dutch introduced the first captured Africans to America, planting the seeds of a slavery system that evolved into a nightmare of abuse and cruelty that would ultimately divide the nation.

Slavery in America

Enslaved people organized r<a href="http://www.history.com/topics/black-history/slavery-iv-slave-rebellions">ebellions</a> as early as the 18th century. In 1739, enslaved people led the Stono Rebellion in South Carolina, the largest slave rebellion during the colonial era in North America.&nbsp; Other rebellions followed, including the one led by&nbsp; Gabriel Prosser in Richmond in 1800 and by <a href="https://www.biography.com/people/denmark-vesey-9517932">Denmark Vesey</a> in Charleston in 1822. These uprisings were brutally repressed.

The revolt that most terrified enslavers was that led by <a href="https://www.history.com/topics/black-history/nat-turner">Nat Turner</a> in Southampton County, Virginia, in August 1831. Turner’s group, which eventually numbered as many 50 Black men, murdered some 55 white people in two days before armed resistance from local white people and the arrival of state militia forces overwhelmed them.

Like with previous rebellions, in the aftermath of the Nat Turner’s Rebellion, slave owners feared similar insurrections and southern states further passed legislation prohibiting the movement and assembly of enslaved people.

As slavery expanded during the second half of the 18th century,&nbsp; a growing <a href="http://www.history.com/topics/black-history/abolitionist-movement">abolitionist movement</a> emerged in the North.

From the 1830s to the 1860s, the movement to abolish slavery in America gained strength, led by formerly enslaved people&nbsp; such as <a href="https://www.history.com/topics/black-history/frederick-douglass">Frederick Douglass</a> and white supporters such as <a href="https://www.biography.com/people/william-lloyd-garrison-9307251">William Lloyd Garrison</a>, founder of the radical newspaper <em>The Liberator</em>.

While many abolitionists based their activism on the belief that slaveholding was a sin, others were more inclined to the non-religious “free-labor” argument, which held that slaveholding was regressive, inefficient and made little economic sense.

Black abolitionists&nbsp; and antislavery northerners led meetings and created newspapers. They also had begun helping enslaved people escape from southern plantations to the North via a loose network of safe houses as early as the 1780s. This practice, known as the <a href="https://www.history.com/topics/black-history/underground-railroad">Underground Railroad</a>, gained real momentum in the 1830s.

6 Strategies Harriet Tubman and Others Used to Escape Along the Underground Railroad

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Conductors like <a href="https://www.history.com/topics/black-history/harriet-tubman">Harriet Tubman</a> guided escapees on their journey North, and “<a href="https://www.history.com/news/8-key-contributors-to-the-underground-railroad">stationmasters</a>” included such prominent figures as Frederick Douglass, Secretary of State <a href="https://www.history.com/topics/american-civil-war/william-seward">William H. Seward</a> and Pennsylvania congressman Thaddeus Stevens. Although no one knows for sure how many men, women, and children escaped slavery through the Underground Railroad, it was in the thousands (<a href="https://www.pbs.org/wnet/african-americans-many-rivers-to-cross/history/who-really-ran-the-underground-railroad/">estimates</a> range from 25,000 to 100,000).&nbsp;&nbsp;

The success of the <a href="https://www.history.com/topics/black-history/underground-railroad">Underground Railroad</a> helped spread abolitionist feelings in the North. It also undoubtedly increased sectional tensions, convincing pro-slavery southerners of their northern countrymen’s determination to defeat the institution that sustained them.

Learn more about the Missouri Compromise of 1820, a temporary solution to the brewing controversy over slavery in the United States.

Missouri Compromise

America’s explosive growth—and its expansion westward in the first half of the 19th century—would provide a larger stage for the growing conflict over slavery in America and its future limitation or expansion.

In 1820, a bitter debate over the federal government’s right to restrict slavery over Missouri’s application for statehood ended in a compromise: <a href="https://www.history.com/topics/us-states/missouri">Missouri</a> was admitted to the Union as a slave state, <a href="https://www.history.com/topics/us-states/maine">Maine</a> as a free state and all western territories north of Missouri’s southern border were to be free soil.

Although the <a href="https://www.history.com/topics/missouri-compromise">Missouri Compromise</a> was designed to maintain an even balance between slave and free states, it was only temporarily able to help quell the forces of sectionalism.

Get a crash course on the causes and consequences of the Kansas-Nebraska Act of 1854 with historian Matthew Pinsker.

Kansas-Nebraska Act

In 1850, another tenuous compromise was negotiated to resolve the question of slavery in territories won during the <a href="https://www.history.com/topics/mexican-american-war">Mexican-American War</a>.

Four years later, however, the <a href="http://www.history.com/topics/kansas-nebraska-act">Kansas-Nebraska Act</a> opened all new territories to slavery by asserting the rule of popular sovereignty over congressional edict, leading pro- and anti-slavery forces to battle it out—with <a href="https://www.history.com/news/bleeding-kansas-civil-war">considerable bloodshed</a>—in the new state of Kansas.

Outrage in the North over the Kansas-Nebraska Act spelled the <a href="https://www.history.com/news/whig-party-collapse">downfall</a> of the old <a href="https://www.history.com/topics/whig-party">Whig Party</a> and the birth of a new, all-northern <a href="https://www.history.com/topics/republican-party">Republican Party</a>. In 1857, the <a href="http://www.history.com/topics/black-history/dred-scott-case">Dred Scott decision</a> by the <a href="https://www.history.com/topics/supreme-court-facts">Supreme Court</a> (involving an enslaved man who sued for his freedom on the grounds that his enslaver had taken him into free territory) effectively repealed the Missouri Compromise by ruling that all territories were open to slavery.

In 1859, two years after the Dred Scott decision, an event occurred that would ignite passions nationwide over the issue of slavery.

<a href="http://www.history.com/topics/harpers-ferry">John Brown’s raid on Harper’s Ferry</a>, Virginia—in which the abolitionist and 22 men, including five Black men and three of Brown’s sons raided and occupied a federal arsenal—resulted in the deaths of 10 people and Brown’s hanging. 

The insurrection exposed the growing national rift over slavery: Brown was hailed as a martyred hero by northern abolitionists but was vilified as a mass murderer in the South.

The South would reach the breaking point the following year, when Republican candidate <a href="/topics/us-presidents/abraham-lincoln">Abraham Lincoln</a> was elected as president. Within three months, seven southern states had seceded to form the <a href="/topics/american-civil-war/confederate-states-of-america">Confederate States of America</a>; four more would follow after the <a href="/topics/american-civil-war/american-civil-war-history">Civil War</a> began. 

Though Lincoln’s anti-slavery views were well established, the central Union war aim at first was not to abolish slavery, but to preserve the United States as a nation. 

Abolition became a goal only later, due to military necessity, growing anti-slavery sentiment in the North and the self-emancipation of many people who fled enslavement as Union troops swept through the South. 

On September 22, 1862, Lincoln issued a preliminary emancipation proclamation, and on January 1, 1863, he made it official that “slaves within any State, or designated part of a State…in rebellion,…shall be then, thenceforward, and forever free.”

By freeing some 3 million enslaved people in the rebel states, the <a href="/topics/american-civil-war/emancipation-proclamation">Emancipation Proclamation</a> deprived the Confederacy of the bulk of its labor forces and put international public opinion strongly on the Union side.

Though the Emancipation Proclamation didn’t officially end all slavery in America—that would happen with the passage of the <a href="/topics/black-history/thirteenth-amendment">13th Amendment</a> after the Civil War’s end in 1865—some 186,000 Black soldiers would join the Union Army, and about 38,000 lost their lives. 

Historians and experts examine the American system of racialized slavery and the hypocrisy it relied on to function.

The System of American Slavery

The 13th Amendment, adopted on December 18, 1865, officially abolished slavery, but freed Black peoples’ status in the post-war South remained precarious, and significant challenges awaited during the <a href="https://www.history.com/topics/american-civil-war/reconstruction">Reconstruction</a> period.

Previously enslaved men and women received the rights of citizenship and the “equal protection” of the Constitution in the <a href="https://www.history.com/topics/black-history/fourteenth-amendment">14th Amendment</a> and the right to vote in the <a href="https://www.history.com/topics/black-history/fifteenth-amendment">15th Amendment</a>, but these provisions of the Constitution were often ignored or violated, and it was difficult for Black citizens to gain a foothold in the post-war economy thanks to restrictive <a href="http://www.history.com/topics/black-history/black-codes">Black codes</a> and regressive contractual arrangements such as <a href="http://www.history.com/topics/black-history/sharecropping">sharecropping</a>.

Despite seeing an unprecedented degree of Black participation in American political life, Reconstruction was ultimately frustrating for African Americans, and the <a href="https://www.history.com/news/kkk-birth-of-a-nation-film">rebirth of white supremacy</a>—including the rise of racist organizations such as the <a href="https://www.history.com/topics/ku-klux-klan">Ku Klux Klan</a> (KKK)—had triumphed in the South by 1877.

Almost a century later, resistance to the lingering racism and discrimination in America that began during the slavery era led to the <a href="http://www.history.com/topics/black-history/civil-rights-movement">civil rights movement</a> of the 1960s, which achieved the greatest political and social gains for Black Americans since Reconstruction.

<em><a href="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fprofiles.howard.edu%2Fana-lucia-araujo&amp;data=05%7C02%7CAmanda.Onion%40aenetworks.com%7Cf8d724997f6f46882ccf08dc65171e5a%7Cf7288ab1d50847bab3347331cff3374c%7C1%7C0%7C638496397204987354%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=hmxskP1C6ePCBPJMD74XsELuzRg%2Fc1JnRZtCK5JaQCc%3D&amp;reserved=0">Ana Lucia Araujo</a>, a historian of slavery and the Atlantic slave trade, edited and contributed to this article. Dr. Araujo is currently Professor of History at Howard University in Washington, D.C., and member of the International Scientific Committee of the UNESCO Routes of Enslaved Peoples Projects. Her three more recent books are <a href="https://www.bloomsbury.com/us/reparations-for-slavery-and-the-slave-trade-9781350297661/">Reparations for Slavery and the Slave Trade: A Transnational and Comparative History</a>, <a href="https://www.cambridge.org/core/books/gift/62EDFCC01526938F638EF77AB6A4E8A9">The Gift: How Objects of Prestige Shaped the Atlantic Slave Trade and Colonialism</a>, and <a href="https://press.uchicago.edu/ucp/books/book/chicago/H/bo229867701.html">Humans in Shackles: An Atlantic History of Slavery</a>.</em>

Slavery in America was the legal institution of enslaving human beings, mainly Africans and African Americans. Slavery existed in the United States from its founding in 1776 and became the main cause behind the country's bloody Civil War. Slavery officially ended in America with the passage of the 13th Amendment following the Civil War's end in 1865.

U.S. Slavery: Timeline, Figures & Abolition | HISTORY

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Slavery

Slavery was practiced in the American colonies in the 17th and 18th centuries, and helped propel the United States into the Civil War. Learn more about slavery and its abolition in America.

Slavery: Definition and Abolition | HISTORY

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<p>America’s Founding Fathers decided that one elected civilian—the U.S. president—would lead the executive branch of the federal government, a governmental structure that has remained in place for more than 200 years.</p>


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<p><a href="http://www.christopherklein.com/">Christopher Klein</a> is the author of four books, including <em>When the Irish Invaded Canada: The Incredible True Story of the Civil War Veterans Who Fought for Ireland’s Freedom</em> and <em>Strong Boy: The Life and Times of John L. Sullivan</em>. His work has appeared in numerous publications, including <em>The Boston Globe</em>,<em> The New York Times</em>, and <em>National Geographic Traveler. </em>Follow Chris at <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.twitter.com_historyauthor&amp;d=DwMFaQ&amp;c=bHpC9irXhivtSwyVyKc43lLt4-cAwmmH7TeQLPqTb5E&amp;r=0ZpTu-He2V3GUI-VETMmkwm8-GyOWSyeMJXqt7G42KA&amp;m=K4QAG6bPcooItZtsSRYJId99sCdkkYnSQnbG55Y82ZU&amp;s=reHlmdZq8nMnpunXM6VDAaQCLeVwu9L3gbscryyWKD8&amp;e=">@historyauthor</a>.</p>


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<p><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__msbeckylittle.tumblr.com_&amp;d=DwMFaQ&amp;c=bHpC9irXhivtSwyVyKc43lLt4-cAwmmH7TeQLPqTb5E&amp;r=DnM91hJ18gcNL3QDGSFbaxqDKqUNYha-dXU1EFEqguU&amp;m=G-7sCRahZ4NeqUBMRIzpVYF_SWJZdHf6oZ3GZnosXWc&amp;s=zmyoc9Pijw9wmJOCBZEXDORhhj0TxUZKXRRMCwVGaTI&amp;e=">Becky Little</a> is a journalist based in Washington, D.C. Follow her on <a title="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbsky.app%2Fprofile%2Fmsbeckylittle.bsky.social&amp;data=05%7C02%7CAmanda.Onion%40aegm.com%7C2663a56e98de478ecc4108dd65759161%7Cf7288ab1d50847bab3347331cff3374c%7C1%7C0%7C638778277802339990%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&amp;sdata=6PAUrlZQy2qoyw95FxhBFEbAAeD6eFd4YU65oI9SW98%3D&amp;reserved=0" href="https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbsky.app%2Fprofile%2Fmsbeckylittle.bsky.social&amp;data=05%7C02%7CAmanda.Onion%40aegm.com%7C2663a56e98de478ecc4108dd65759161%7Cf7288ab1d50847bab3347331cff3374c%7C1%7C0%7C638778277802339990%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&amp;sdata=6PAUrlZQy2qoyw95FxhBFEbAAeD6eFd4YU65oI9SW98%3D&amp;reserved=0" target="_blank" rel="noopener" data-outlook-id="cfb94f9b-f0df-4c8f-91fa-a17329b660ca">Bluesky</a>.</p>


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<p><a href="http://www.davidwblight.com/latest">David Blight</a> is a teacher, scholar and public historian. A professor of American history at Yale University and director of the school's Gilder Lehrman Center for the Study of Slavery, Resistance and Abolition, he is an award-winning author of many <a href="http://www.davidwblight.com/books/">books</a> including <em>American Oracle: The Civil War in the Civil Rights Era</em> and the Pulitzer Prize-winning&nbsp;biography <em><a href="http://www.davidwblight.com/books/">Frederick Douglass: Prophet of Freedom</a>.&nbsp;</em></p>


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Slavery ‑ Stories

Thomas Jefferson and Sally Hemings: What’s Known

How Black‑Run Newspapers Bolstered the Abolitionist Movement

5 Secret Codes Used to Communicate in the Underground Railroad

How Bleeding Kansas Led to the Civil War

9 Facts About the Transatlantic Slave Trade

9 Events That Led to the Civil War

The Failed 1846 Amendment That Tried to Contain Slavery

Alexander Hamilton’s Complicated Relationship to Slavery

Why Thomas Jefferson’s Anti‑Slavery Passage Was Removed from the Declaration of Independence

40 Years a Slave: The Extraordinary Tale of an African Prince Stolen from His Kingdom

What Frederick Douglass Revealed—and Omitted—in His Famous Autobiographies

Details of Brutal First Slave Voyages Discovered