The abolitionist movement long predated the Civil War

Abolitionists shaped American history from the Revolution to the Civil War

Abolitionists of all backgrounds organized against slavery from the founding era onward. Historian Manisha Sinha argues that their decades of activism fundamentally shaped American democracy and made emancipation possible.

Adams was a vocal opponent of slavery during the Revolutionary era

In letters written during the Revolution, Adams clearly opposed slavery—calling it an unjust scheme and highlighting the contradiction of fighting for freedom while enslaving others. Read it in her own words here in a letter to John Adams.

Abraham Lincoln's victory in 1860 sparked Southern secession—even before his inauguration

Abraham Lincoln's election on an antislavery expansion platform convinced many Southerners that their way of life was under threat. Within three months, seven states seceded from the Union—forming the Confederacy—before Lincoln took office in March 1861.

Listen to firsthand accounts of how Black Americans fought to end slavery and shape Reconstruction

This podcast explores the actions of Black Americans who fought for freedom before, during, and after the Civil War—highlighting their key role in abolition and the Reconstruction era.

Whitman's antislavery writing often focused on white Americans

The poet was openly opposed to slavery, though some of his writing focuses on abolition’s benefits for white people rather than for the lives of the enslaved.

Hear how the world reacted to the American Civil War

European nations closely watched the Civil War for its economic and political consequences. Some European nations quietly engaged diplomatically with the Confederacy but withheld recognition. When the Union made slavery's abolition a central cause, European public opinion turned sharply against the South.

The Emancipation Proclamation shifted the purpose of the war for the Union

Issued on Jan. 1, 1863, the Emancipation Proclamation declared enslaved people in Confederate-held territory free, redefining the Union's cause from merely preserving the nation to abolishing slavery.

Read an annotated 1866 essay by abolitionist Frederick Douglass, where he laid out his vision for reshaping America after the Civil War.

Learn about political conventions held before the Civil War by Black Americans to organize for civil rights

Beginning in 1830, free Black men and women across the US and Canada held "Colored Conventions"—state and national political meetings that served as a cornerstone of 19th-century Black organizing for civil and human rights.

Truth is best known for her 1851 speech in Akron linking abolition and women's rights

At the 1851 Women's Rights Convention, Truth gave a speech that cemented her legacy, weaving together abolition and women's rights in remarks that became among the most quoted of the 19th century.

Whitman founded an antislavery newspaper in Brooklyn

In 1948, Whitman founded a “free soil” newspaper called the Brooklyn Freeman, which explicitly argued against slavery. That activism led to problems for the paper, including an attack on its headquarters after the release of its first issue.

Sojourner Truth's 'Aint I a Woman?' speech addressed the disparity between the treatment of white and black women in America

Truth, a former slave, delivered the address acknowledging both abolition and the treatment of women at a Women's Convention in 1851. She is believed to have spoken with little to no preparation beforehand. Different versions of the speech exist, as there is no officially published version.

Despite the Juneteenth announcement that they were free, some enslaved people were still held captive.

Truth joined a utopian project in the early 1840s

The Northampton Association of Education and Industry was a brief utopian community in Massachusetts that united abolitionists, reformers, and intellectuals. Truth lived and worked alongside William Lloyd Garrison and Frederick Douglass; this helped to launch her career as a public speaker and activist.

The Lincoln-Douglas debates sharpened the national divide over slavery

In 1858, Abraham Lincoln and Senator Stephen Douglas debated while competing for an Illinois Senate seat. Their seven debates, reprinted nationwide, brought the question of slavery to the forefront—further polarizing the country and propelling Lincoln to national prominence.

In the midst of the Civil War, Lincoln rapidly expanded presidential power

Abraham Lincoln suspended habeas corpus, expanded the army without congressional approval, and issued the Emancipation Proclamation—despite likely lacking authority to unilaterally alter national slave law. His actions set precedents for expanded presidential power in wartime.

The 13th Amendment permanently abolished slavery in the United States

Ratified in December 1865, the 13th Amendment outlawed slavery nationwide except as punishment for a crime. Southern states were required to ratify it under President Andrew Johnson's initial Reconstruction plan before regaining representation, though Congress later imposed stricter conditions.

The Reconstruction Amendments aimed to rebuild the nation and secure freedom after slavery

Ratified between 1865 and 1870 after the conclusion of the war, the 13th, 14th, and 15th Amendments abolished slavery, guaranteed citizenship and equal protection, and extended voting rights to Black men—transforming the Constitution's definition of liberty and equality.

The ACLU was founded in 1920 in direct response to the suppression of speech during World War I

The mass arrest and prosecution of anti-war activists, socialists, and immigrants under the Espionage and Sedition Acts prompted a group of civil libertarians to form the American Civil Liberties Union to defend constitutional rights.

US westward expansion—and the status of slavery in the new territories—was a major cause of the American Civil War

The addition of new western lands forced the nation to confront whether slavery would spread beyond the South. Each debate over the admission of a new state sharpened the divide between free and slaveholding regions.

Whitman's view on slavery was informed by a trip to New Orleans

In 1848, Walt Whitman traveled with his brother to New Orleans to pursue a job opportunity at the Daily Crescent newspaper. While there, he witnessed firsthand the horrors of the slave trade, an experience that would inform the political and artistic projects that followed.

According to Confederate leaders, the defense of slavery was the primary reason for secession.

Francis Scott Key was opposed to slavery in principle, though he held slaves and was opposed to abolition.

Robert Smalls escaped slavery by piloting a stolen Confederate ship to freedom, then became an influential Black political leader during Reconstruction.

Learn how Mexico’s anti-slavery stance shaped the US–Texas conflict

Historian Alice Baumgartner explores how Mexico’s abolition of slavery clashed with Anglo settlers' ambitions in Texas. The episode reveals how enslaved people fled south to freedom, reshaping the politics that led to Texas independence and the Mexican-American War.

'Uncle Tom's Cabin,' Harriet Beecher Stowe's influential antislavery novel, was originally released as 41 weekly newspaper installments.

Slavery in the US: a timeline

In 1619, a ship with 20 captives landed at Point Comfort in Virginia, ushering in the era of American slavery. Scroll through this timeline to learn more about slavery in the US and its long lasting effects.

Black women played a central but often overlooked role in the suffrage movement

Although the women's suffrage movement is often portrayed as a white story, Black women like Truth, Ida B. Wells, and Mary Church Terrell fought for voting rights—frequently facing racism within the movement itself.

Hamilton opposed slavery in principle but participated in the institution

Alexander Hamilton spoke against slavery, helped found the New York Manumission Society, and supported gradual emancipation while also participating in transactions involving enslaved people through his in-laws—and possibly within his own household, though historians debate this.

Edwin Porter's 1903 adaptation of 'Uncle Tom's Cabin' was one of the earliest American full-length narrative films.

The Kansas-Nebraska Act sparked violence that foreshadowed the Civil War

The 1854 Kansas-Nebraska Act let settlers vote on whether to allow slavery, repealing the Missouri Compromise. Competing proslavery and antislavery groups poured into Kansas, sparking years of bloody conflict known as "Bleeding Kansas."

The Dred Scott decision denied citizenship to people of African descent

In 1857, the Supreme Court ruled in Dred Scott v. Sandford that Black Americans could not be US citizens. The decision heightened an already brewing conflict and became a key factor in pushing the nation toward civil war.

Timeline of women in labor history

In 1866, newly freed black women working as laundresses in Jackson, Mississippi, formed a union and went on strike for higher wages. But it wasn't until 1974, that the Coalition of Labor Union Women was founded as America's only national organization for union women. Want to find out more about the history of women in the labor movement? Click here for the full timeline.

Abraham Lincoln's election in 1860 triggered a cascade of Southern secessions and the formation of the Confederacy, culminating in the Confederate attack on Fort Sumter in Charleston, South Carolina.

The early DOJ led the first major federal civil rights prosecutions

During Reconstruction, the newly formed Department of Justice prosecuted Ku Klux Klan violence in the South—securing over 1,000 indictments and more than 500 convictions by 1873 in defense of newly established civil rights protections.

The long-tail influence of Thoreau's 'Civil Disobedience'

His essay "Civil Disobedience" laid out both a practical and a moral plan for resisting unjust governments, inspiring civil rights leaders like Mahatma Gandhi and Martin Luther King Jr., as well as anti-war anarchists like Emma Goldman and literary figures like Leo Tolstoy.

One of the earliest Memorial Day ceremonies was held by newly freed Black Americans in South Carolina

On May 1, 1865, roughly 10,000 people, mostly freed slaves, paraded around a Charleston racetrack where Union prisoners had been buried, predating the first national commemoration at Arlington National Cemetery by three years.

The origins and growth of the Juneteenth holiday

The American holiday of Juneteenth celebrates the emancipation of African American slaves, a process which unfolded over the four years of the Civil War and several months afterward. June 19 took on special significance as the day Union officials proclaimed slaves free in Texas in 1865, the last holdout after the Civil War ended. Roughly 4 million people were freed from slavery as a result of emancipation. Read this brief article summarizing the holiday's development.

The canal became a highway for American reform movements

Beyond goods, the canal carried ideas. Its corridor hosted Second Great Awakening revivals and became a center for activism—fueling abolitionist networks, women’s suffrage organizing, and other reform movements.

View animated battle maps from every major skirmish of the American Civil War.

Was the Civil War really about states' rights?

The Civil War was fought over slavery, and Confederate leaders and supporters admitted as much in the build-up to the war and after. But later on, after the South's defeat, the lie of the Lost Cause was pushed—and it persists to this day. This four-minute video details the story of the Lost Cause, "state's rights", Confederate monuments, and the machinations behind them.

Nineteenth-century, hand-drawn infographics on US slavery and race

In the second half of the 19th century, researchers studying the behavior of the millions of emancipated Americans after the Civil War used "information graphics" to cut through the noise of racially charged debate. In this collection from Stanford, you can see century-old, stunningly hand-drawn data visualizations showing racial demographics, the effects of emancipation on cotton prices, and more.

A section condemning slavery was cut from the Declaration

Thomas Jefferson included a passage in his original draft denouncing slavery. This explainer from the Henry Ford Museum explores why Congress removed it to preserve colonial unity and how that decision shaped the nation's earliest political compromises.

Hear the story of Truth's life

This podcast traces Truth's life from slavery in New York to her status as an abolitionist icon—covering her daring escape, legal victories, landmark speeches, and lasting impact on racial equality and women's rights.

A map of slavery's spread across the US

Need a visual on how prevalent slavery was in the US? Scroll through this interactive map and timeline based on census data from 1790 to 1860.

The Royal Governor of Virginia offered slaves their freedom if they escaped and fought for the British in the American Revolutionary War.

Thoreau's 'Civil Disobedience' was largely a protest against the Mexican-American War

Henry David Thoreau refused to pay taxes that funded what he saw as an unjust war waged to expand slavery. His act of protest inspired his famous essay "Civil Disobedience," a foundational text for nonviolent resistance.

Bills passed during the Civil War shaped postwar America

Despite the war with the South, Congress passed transformative laws like the Homestead Act and the Morrill Land-Grant College Act, which encouraged westward settlement and expanded higher education.

What's the role of forced prison labor in a land where slavery is illegal?

Companies across the South profited off the forced labor of people in prison after the Civil War. This hourlong investigative podcast episode explores the role forced (and often unpaid) prison labor has played in the US since slavery was abolished.

'Uncle Tom's Cabin,' published in 1852, was the second best-selling book of the 19th century, after the Bible.