And on the original issue it's good to point out that there were millions of slaves throughout human history who were not black... That doesn't make the concept

And on the original issue it's good to point out that there were millions of slaves throughout human history who were not black... That doesn't make the concept any better, but it hasn't been historically a racial issue (people were enslaved because of a difference in religion, place they lived in regardless of ethnicity or solely social status).