J.m. Coetzee said this quote
“ No consciousness that we would recognize as consciousness. Not awareness, as far as we can make out, of a self with a history. What I mind is what tends to come next. They have no consciousness therefore. Therefore what? Therefore we are free to use them for our own ends Therefore we are free to kill them? Why? What is so special about the form of consciousness that we recognize that makes killing a bearer of it a crime while killing an animal goes unpunished? ”