If newly elected President Abraham Lincoln did not intend to mess with or end slavery in the South, why did the South secede from the US and create the Confederate States of America? Was a civil war between the North and South inevitable?
I highly recommend you browse through the American Civil War section of the FAQ, as it addresses all the questions you are posing.
However, I am sure that flaired users on this sub could go further and explain why the phrase Abraham Lincoln did not intend to mess with or end slavery in the South might be an inappropriate way to frame the conflict.