Whilst there's always room for others to contribute, you might find this extensive answer on the causes of the Civil War by /u/Georgy_K_Zhukov helpful, as it helps to illuminate how tensions over slavery played out in such a way to lead to the Civil War. You may also find this answer of mine helpful, which explains why it was impractical to the point of being effectively impossible for the US Government to achieve emancipation through federal law by offering to compensate slave owners.