It was to try and rebuild Georgia after the civil war. Lincoln recognized that the Emancipation Proclamation had to be followed by a constitutional amendment to guarantee the abolishment of slavery. The 13th amendment was passed at the end of the Civil War before the Southern states had been restored to the Union and should have easily passed the Congress.
Is there more to this question?
Answer:
In the electoral college, each state gets a different number of representatives based on the total population of the state. It was created by the Framers because they didnt trust people to make electoral decisions on their own. They wanted the president chosen by what they thought of as "enlightened statesmen".