Sure. Basically what slaveowners thought. Difference of course was slaves were humans, so at some point the cognitive dissonance of the privileged masters thankfully became unbearable at some point (besides of course the active roles slaves could take in their liberation) .
(At this point I feel the need for a disclaimer: No, I don’t think animals are equal to humyns. No, I don’t think being a slave and being a factory farmed animal is the same. No, I don’t say slaves are animals).
This “natural order” quotes I hear oh so often. You do not refuse to use planes or get MRIs I hope, fearing to unsettle that natural order?
But that’s harsh, you grant them more than Descartes did (but still draw the same conclusions I have to suppose.)
The irony of my user name is lost to me, considering it shows my (theoretical) fondness even of non-biological life.