Argueably, slavery has survived. We're all slaves to a point, buying our homes and land and food, slaves to our own money.
The only difference is that we are free to evolve and prosper to a certain point if we aim for it. Whereas slaves were surpressed regardless of the individual skills and talents.
So todays slavery doesn't have the evil and negative stamp on it anymore.
[failed Victor impersonation]
And slavery has been assimilated into the term society. And has been accepted as a norm.
Without it, things would be anarchystically chaotic, and the world would be much worse without modern slavery. This we can imagine and understand, and so we accept todays form as slavery, masochistically.
[/failed Victor impersonation]