The Missouri Compromise, also called the Compromise of 1820, was an agreement passed in 1820 between the pro-slavery and anti-slavery factions in the United States, involving primarily the regulation of slavery in the western territories. It prohibited slavery for all new states north of the 36° 30'line, or the border of the Arkansas territory (excluding Missouri). Prior to the agreement, the House of Representatives had refused to accept this boundary and a conference committee was appointed. The United States Senate refused to concur in the amendment, and the whole measure was lost. During the following session (1819-1820), the House passed a similar bill with an amendment introduced on January 26, 1820 by John W. Taylor of New York allowing Missouri into the union as a slave state. In the meantime, the question had been complicated by the admission in December of Alabama, a slave state (the number of slave and free states now becoming equal), and by the passage through the House (January 3, 1820) of a bill to admit Maine as a free state.
The Senate decided to connect the two measures, and passed a bill for the admission of Maine with an amendment enabling the people of Missouri to form a state constitution. Before the bill was returned to the House, a second amendment was adopted on the motion of Jesse B. Thomas of Illinois, excluding slavery from the Missouri Territory north of 36°30' (the southern boundary of Missouri), except within the limits of the proposed state of Missouri. The House of Representatives refused to accept this and a conference committee was appointed.
In an April 22 letter to John Holmes, Thomas Jefferson wrote that the division of the country created by the Compromise line would eventually lead to the destruction of the Union:
On the constitutional side, the Compromise of 1820 was important as the first precedent for the congressional exclusion of slavery from public territory acquired since the adoption of the Constitution, and also as a clear recognition that Congress has no right to impose upon a state asking for admission into the Union conditions which do not apply to those states already in the Union.
Following Missouri's admission to the Union in 1821, no other states were admitted until 1836 when Arkansas became a slave state, followed by Michigan in 1837 as a free state.
The 1857 Supreme Court decision, Dred Scott v. Sandford, ruled the first Compromise unconstitutional (while ratifying the second Compromise's proposition that persons of African descent could not be U.S. citizens), inflaming antislavery sentiment in the North and contributing to the outbreak of the American Civil War in 1861.
1820 in law | African-American history | History of slavery in the United States | History of Missouri | History of United States expansionism | Legal history of the United States | United States federal territory and statehood legislation
Missouri-Kompromiss | Compromis du Missouri | פשרת מיזורי | Missouri-compromis | ミズーリ協定 | Compromisso do Missouri | Missouri Compromise | Missourikompromissen | 密蘇里州協定
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It uses material from the
"Missouri Compromise".
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