What extent does the civil war solve the problems that had been facing the country prior to the war?

one problem it solved was bringing the south back to the union. so it brought the united staes together again. it also freed all the slaves in the south and later in the north. but after that it kind of just made a mess of things because the African Americans were being treated worse than before in my opinion and the south still really didn't want anything to do with the United States. they were just forced back in.