It has been an obsession of human beings to create a hierarchy that places the human species on top and lumps all the "other animals" together beneath us. The resulting "speciesism" allows us to look upon animals as less deserving of all manner of rights and considerations than humans. To support this lower status, humans have argued that animals act instinctually; don't have souls; don't feel physical pain like we do; and lack self-consciousness, cognitive intelligence, emotional feelings, morality, and ethics.
