The Thirteen Amendment
The thirteen amendment to the untied states constitution abolished slavery and involuntary servitude, expect as punishment for crime.
Republicans portrayed slavery as uncivilized and argued for abolition as necessary step in national progress.
Amendment supporters also argued that the slave system had negative effects on white people.
President Abraham Lincoln (1809-65) carefully framed the conflict as concerning the preservation of the Union rather than the abolition of slavery.
Abraham Lincoln sign the Emancipation Proclamation to end slavery.