This is also true of American slaves.
> Their slavery wasn't based on racial status, but on class, and slavery wasn't considered genetically predetermined, but a product of status and conquest.
So is this. You think the child of a free black was enslaved?
Bullshit. By the 19th century (which is the century everybody talks about) it was almost legally impossible to free a slave in the American south (things like, say, a $200 tax in Florida... which was more money than most people saw in a year).
Even when possible it was essentially never done.
> So is this. You think the child of a free black was enslaved?
In many of the US slave states, if you were a free black person, regardless of who your parents were, you had to either leave the state within a fixed time, or you would be enslaved. So, yes.
Believe it or not, most slaves were owned by fairly wealthy people.