Only a very small minority of free black or white people owned slaves in the United States.
A tiny, tiny percentage of free blacks. Free white families in the south accounted for near 30% of slaveowners.
Many of the richest and largest slave holders in the Southern States were indeed free black men and women. For example, C. Richards was the largest slave owner in Louisiana, holding 152 slaves on her sugarcane plantation and Justus Angel and his mistress collectively held 168 slaves in South Carolina. The black slave owners of the South also supported the Condfederacy in the civil war.
It is certainly true there were black slaveowners, but I'm sure, as many know, those free blacks were often prisoners in their own states.
Laws in many Southern states forbade them to even leave the state - unless it was permanent, they were restricted in commerce, legal matters, etc...; just simply living for a free black, even ones who had built up wealth was not as some would have you believe.
As the war approached, even more laws were written that could snatch away their "freedom" at any given moment
...and of course, Dred Scott made it clear they were not even citizens of the country they lived in. read that again:
Even Free Blacks were not citizens of the country they lived in
Yes, some black slaveowners bought slaves to purchase their kin's freedom, sometimes a husband would purchase a wife, some did it for economic, pragmatic reasons, and some were just as dastardly as their fully white counterparts. All true.
Note also, a good portion of those "negro slaveowners" were mulattoes -- by all appearances, quite white. But coal black, brown or white - still, all in all, the numbers were very, very small.
Also, the preponderance of those (what are referred to as) "black slaveholders" were actually
Colored Creoles.
An important legal distinction, which I'll explain in my next post.
Not to veer too off-topic, but I think a few might find it interesting.