As a species we finally got rid of it (at least officially) in 1981 when Mauritania became the last nation to outlaw slavery.
Slavery has not been eliminated. And will never be eliminated. Because it is natural. Laws outlawing what is natural, never work. Anti-usury laws didn't work either.
Man thinks he is more powerful than he really is.
There are damned facts that we perhaps wish were not true, but I don't see how it will help me by lying to myself, just because those realities are uncomfortable.