> Slavery is an excellent cognate to this.

No it's not. I always find the idea that humans are not in some way special (at least to other humans) off-putting. Even animals treat members of their own species generally better than they treat other species.

I love animals, I think we should treat them with dignity and respect as much as possible. At the same time I would not hesitate to kill an animal for food or if it endangered another human.