Sadly, despite the resounding Northern victory, the so called "American Civil War" (1860-1865) never really ended, as the cancer that was "The South" was allowed to persist, metastasizing into sharecroppers and Jim Crow laws and the KKK and thousands of lynchings. But then this aggressive Southern disease infected and took over the Republican Party - the very party that engaged their destruction a hundred years earlier. Goldwater, Regan, Nixon, and you have today's insanity, insto-presto in just the past 40 years (LOL I'm old). Legions of monsters, breaking down democracy and society across the country in pious fervor.
Somehow, despite desegregation and women's lib and gay marriage and so on, we've fallen under the sway of the Confederacy Risen, the Republican Party, the Southern Jim Crow culture writ large as "American Culture" and proving to be the doom of not just America, but the world.