Causes leading up to civil war

1787: 3/5 Clause

The 3/5 Clause was a compromise during the Constitutional Convention that counted each enslaved person as three-fifths of a person for congressional representation, enhancing the political power of slave-holding states while perpetuating inequality.

1820: Missouri Compromise

The Missouri Compromise admitted Missouri as a slave state and Maine as a free state while establishing the 36°30′ line to limit slavery's expansion, temporarily easing tensions between North and South but revealing deep national divisions.

1840: Manifest Destiny

Manifest Destiny was the belief that the U.S. was destined to expand across North America, promoting westward expansion and the annexation of territories, which intensified conflicts over slavery and displaced Native American populations.

1845: Texas Annexation

The annexation of Texas as a slave state reignited debates over slavery, increasing the number of slave states and polarizing the nation, as Northern fears grew about the extension of slavery disrupting the balance of power.

1846: Wilmot Proviso

The Wilmot Proviso proposed banning slavery in territories acquired from Mexico, intensifying sectional conflict and energizing the anti-slavery movement in the North, though it ultimately failed to pass Congress.

1850: Compromise of 1850

The Compromise of 1850 aimed to ease tensions by admitting California as a free state and allowing popular sovereignty in new territories, but it also strengthened the Fugitive Slave Act, deepening sectional divides.

1850: Fugitive Slave Act

This act required the return of escaped slaves to their owners, even from free states, inflaming Northern abolitionist sentiment and leading to widespread resistance against perceived federal support for slavery.

1852: Publication of Uncle Tom’s Cabin

"Uncle Tom’s Cabin" by Harriet Beecher Stowe depicted the brutal realities of slavery, galvanizing anti-slavery sentiment in the North and influencing public opinion on slavery in both the North and South.

1854: Kansas-Nebraska Act

The Kansas-Nebraska Act allowed settlers to decide on slavery through popular sovereignty, effectively repealing the Missouri Compromise and leading to violent confrontations known as "Bleeding Kansas."

1854: Bleeding Kansas

"Bleeding Kansas" was marked by violent clashes between pro-slavery and anti-slavery settlers, highlighting national tensions and serving as a precursor to the Civil War by dramatizing the ethical dilemmas surrounding slavery.

1856: The Caning of Charles Sumner

The caning of Senator Charles Sumner by Congressman Preston Brooks exemplified rising tensions between North and South, shocking many and energizing anti-slavery sentiments, thus deepening national divides.

1857: Dred Scott Decision

The Dred Scott decision ruled that African Americans could not be citizens and that Congress could not regulate slavery in the territories, enraging abolitionists and reinforcing the view that the government upheld slavery.

1858: Lincoln-Douglas Debates

The Lincoln-Douglas Debates focused on the expansion of slavery, with Lincoln opposing it and Douglas advocating for popular sovereignty, raising Lincoln’s profile and setting the stage for his presidential campaign.

1859: John Brown’s Raid

John Brown’s failed raid on Harpers Ferry aimed to incite a slave uprising, which polarized public opinion and heightened tensions between the North and South, illustrating the radicalization of the anti-slavery movement.

1860: Election of Abraham Lincoln

Lincoln’s election without Southern electoral support led to widespread Southern fears about the future of slavery, prompting several states to secede from the Union and setting the stage for the Civil War.

1861: Crittenden Compromise

The Crittenden Compromise sought to prevent civil war by proposing amendments to protect slavery in the South but ultimately failed, highlighting the impossibility of reconciling the deep divisions in the country.

1861: Secession of the Deep South States

Following Lincoln's election, seven Southern states seceded, claiming their rights to uphold slavery were under threat, marking a critical point in history that directly led to the Civil War.

1861: Attack on Fort Sumter

The Confederate attack on Fort Sumter in April 1861 marked the beginning of the Civil War, galvanizing public support for military action and escalating the conflict between North and South.