Thomas Dilorenzo's book shows pretty conclusively that Abraham Lincoln did more to destroy the founders' vision of America then any other president. The "Gatekeepers," as he calls them, have done a masterful job of distorting history and making Lincoln out to be a god.
Have an open mind and read Dilorenzo's two books about Lincoln; the man was not a saint. And no, I am not a Southern apologist. I agree slavery had to end, but I believe and have always believed that the North used the issue to greatly expand federal power. The South was right in principle but wrong on the issue.