slavery

Ohio River

Played a crucial role as a route for westward migration and a boundary between Northern free states and Southern slave states.

Northwest Ordinance of 1787

Established that lands north of the Ohio River would prohibit slavery while lands south of it would allow slavery.

Contentious issue during Missouri's statehood application

Northerners opposed Missouri joining as a slave state over concerns of tipping the balance of power in the Senate.

Missouri Compromise of 1820

Agreement admitting Missouri as a slave state and Maine as a free state, establishing a line at latitude 36°30' to determine slavery boundaries.

Resolution of Missouri's statehood issue

Missouri was admitted as a slave state and Maine as a free state, maintaining Senate balance and limiting slavery's spread in the Louisiana Territory.

Major consequence of the Missouri Compromise

Temporarily resolved the balance of power, but did not address the underlying issues of slavery.

North and South economies by 1860

North was urban and industrial; South was agricultural, reliant on enslaved labor for crops like cotton.

White Southerners' opposition to abolition

Dependency on slavery for the plantation system, fearing economic collapse without it.

Impact of Missouri Compromise on slavery expansion

Established the 36°30' parallel as a boundary for slavery in the Louisiana Territory.

Significance of the 36°30' line

Specified that slavery was allowed south of the line and prohibited north of it, except in Missouri.

White Southerners' perception of abolitionism

Viewed it as a threat to their economy, heavily reliant on enslaved labor.

John Quincy Adams on Missouri Compromise

Believed it was a temporary fix, acknowledging slavery as a continuing contentious issue.

Balance of power in U.S. Senate by 1819

11 states with slavery and 11 without slavery, creating an equal number of senators from both sides.

Major concern for Northerners regarding Missouri in 1819

Worried that admitting Missouri as a slave state would tip the Senate balance toward the South.