Last time I checked over 250,000 "white boys" gave their lives during the civil war to insure the slaves were free. IMHO I would say they have been paid in full.
v/r
Better check your Civil War statistics. The Union Army had beaucoup African-American troops. It's beyond belief that none of them died in the war.
The children of those left back in Africa, if they survived at all, have begotten a generation of oppressed, poverty stricken and malnourished third world victims of tribal warfare. One could make a more sound argument that the progeny of American slaves owe a big acclamation of thanks to the forces that brought their ancestors to these shores. In short, they "owe" someone for their good fortune.
That has always been my contention, especially when you consider that white europeans are not the ones who went into the interior of africa to capture slaves. That business was run by and wholly ruled by local BLACK african tribes who had been in the business long before the Portuguese bought their first slave. They want reparations? Go after the african tribes still there who take pride in their slave trading past. Also go after the party of slavery, the democrat party.