This paper examines the Missouri Compromise of 1820, the landmark political agreement brokered by Henry Clay to resolve the crisis triggered by Missouri's bid to enter the Union as a slave state. The paper outlines the two-part solution Clay proposed — admitting Missouri as a slave state while simultaneously admitting Maine as a free state, and prohibiting slavery north of Missouri's southern border in the Louisiana Purchase territory. It also considers the compromise's fragility, its eventual dissolution with the Kansas-Nebraska Act of 1854, and its role as a precursor to the Civil War of 1861–1862.
The acceptance of new Western territories as part of the United States raised slavery as a contentious issue in national politics. Balancing the interests of those who wanted the practice abolished against the interests of states that claimed the right to manage their own slave populations was a delicate task. The issue became especially pronounced when Missouri petitioned to join the Union as a slave state. By 1819 there were 11 free states and 11 slave states, creating an even balance — but Missouri's admission as a slave state would tilt that balance. Congressman James Tallmadge proposed that Missouri be admitted to the Union only as a free state. Pro-slavery states rejected this as unfair, arguing it would deny Missouri the same rights enjoyed by other states. It was at this point that Henry Clay put forward a two-part solution that he helped broker, which became known as the Missouri Compromise.
Part One of the compromise stipulated that Missouri would be admitted to the Union as a slave state, as its residents wished. To offset this, Henry Clay proposed the simultaneous admission of Maine as a free state. Maine had long petitioned to separate from Massachusetts and join the Union independently, and its admission as a free state would restore the numerical balance between slave and free states.
Part Two established that in the territory acquired through the Louisiana Purchase, any new state north of Missouri's southern borderline would be admitted as a free state. Despite the fact that people on both sides of the debate viewed the compromise as imperfect, it held for more than 30 years until it was effectively overturned by the Kansas-Nebraska Act of 1854 (U.S. History, 2013).
"Crittenden seeks to extend compromise line westward"
"Compromise reflects American willingness to sacrifice for peace"
"Compromise hardens sectional divisions leading to war"
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