The Civil War could have been easily avoided if Lincoln had done one thing; Buy all the slaves there were and then give them their freedom in the North. Expensive? Yes. But far less expensive than prosecuting a war for 4-5 years.
Actually, the blame should be put on the Democratic slaver Party.
Most Blacks complain about slavery and are participants by their own choice in the slaver Party. The Democrat Party has had and still has this evil slavery mentality which it has not turned away from before the Civil War; and has changed for the worse - it is worse now than before. We would do better to remind people of the Democrat slaver Partys history of not only slavery, but of their racism, their KKK, their Progressive to socialists, communism, their hatred for god and Bible, their holocaust of babies, etc. They may now claim that they abhor the likes of the slavery of old, but in reality they just use different methods for the same means; some more ruthless then that of the 1800s. The Democrat slaver Party as a whole is evil and indefensible, the whole being how they were and how they are (worse) today. Why would anyone want to defend the Democrat slavers of then and now?
You make a hell of a point. Unless the war wasn't over slavery.....
Lincoln had no legal or constitutional way of doing that.
Maybe the war would have been avoided if the Confederacy had not fired on A Federal military post.