I wonder, how can one justify in their mind to own another person. It doesn't matter
This has always been an issue for me. Some people may laugh, but as a child, I remember reading the books, Beautiful Joe, and Black Beauty, and couldn't understand human cruelty to any living thing. Slavery still exists, and in the western world. Cruelty is a gross injustice, and we need to look to our own culture first (eg, slaughterhouses and factory farms, and abuse / neglect of the elderly and children).
Fix our own back yard, and the world will follow.
My two.