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The DO

Learn more about the involvement of A.T. Still, MD, DO, in the abolitionist movement in Kansas

By The DO Staff

06.19.25

Before the Civil War, the United States was deeply divided between its proslavery and antislavery citizens. Beginning with the Missouri Compromise of 1820, attempts to compromise on slavery sought to maintain a balance between free and slave states, particularly regarding the expansion of slavery into new territories. The acquisition of new territory because of the United States-Mexican War (1846-48) resulted in new legislation, the Compromise of 1850, which was soon replaced by the Kansas-Nebraska Act of 1854.