Its main cause was the long controversy over the enslavement of blacks. Lincoln's argument in paragraph 5.
The Civil War, or American Civil War, took place in the United States between the Northern states and the Southern states, from 1861 to 1865. This conflict began when the Southern states seceded from the Union and formed the Confederate States of America. The Civil War was motivated by the disagreement that existed between the two groups regarding the abolition of slavery and the extension of the new territories that were being occupied in the west.
With this information, we can conclude that Lincon's argument was always the freeing of slaves.
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