One of the greatest misconceptions of American history is that the Civil War was fought over slavery. Those who subscribe to this belief see President Abraham Lincoln as the benevolent leader who made unimaginable sacrifices in human blood to wipe out America’s greatest sin. While the human sacrifice is indisputable and the sin was monumental, the war’s purpose was not to free blacks from the shackles of bondage. Rather, the Civil War was fought with one purpose in mind: To preserve the Union at all costs. And, to put it in Lincoln’s terms, with no ifs, ands, or buts. You’d...