1. Most humans have ancestral past as slaves, be it serfdom or thraldom.
2. Etmologically the master branch is associated with the concept of a master copy, not a whip lashing plantation owner.
3. Slavery is pretty much a thing of the past, accept from certain parts of the middle east and africa. And let us not forget, the producers of our consumer goods in asia...
Sold by the same companies that foregive to care jackshit about anything. LOL!