So: Yes I can imagine all too well the horror that would have continued perhaps right on up to this day if allowed to go on and it were not impeded by outside force of arms.[/QUOTE]

Actually, as far as I know it was not impeded much by outside forces, and, as you say, the problems continue today in varous forms in spite of a united America.

I am obviously not speaking for slavery (real slavery), but I am in doubt about how much difference it would have made. There is no country today, as far as I know, that have open slavery these day, however else things have happened with their history.