The buying and selling of people is wrong today although it continues in some parts of the world such as parts of africa and asia
People willingly sold themselves into slavery at many times in many cultures. Greek teachers sold themselves to Roman masters to teach children for example.
Thomas Sowell’s Culture Series of three books takes a definitive look at slavery. Good to have a world wide persective rather than a limited leftist US perspective.
That is such a bullshit answer.
Slavery then was bad. Slavery today is bad.
A truth is always true.