The Compromise of 1850
Clay presented on the Senate a series of resolutions later called the Compromise of 1850, which he hoped would settle "all questions in controversy between the free and the slave states, growing out of the subject of slavery." As a part of the Compromise, the federal government would pay $10 million to surrender its claim to New Mexico.
The publication of Harriet Beecher Stowe's Uncle Tom's Cabin (1851-1852)
Uncle Tom's Cabin delivered the message that slavery was not just a political contest, but also a great moral struggle. In quick response, Northern abolitionists Increased their protests against the Fugitive Slave Act, while southern criticized the book as an attack on the south as a whole.
The Kansas-Nebraska Act (1854)
Douglas introduced a bill in Congress to divide the area into two territories, Nebraska in the North and Kansas in the south. If passed, it would repeal the Missouri Compromise and establish popular sovereignty for both territories. Some Northern congressmen saw the bill as a art of a plot to turn the territories into slave states.