Actually many many predators enjoy killing. Why do you think your well fed cat keeps killing birds and mice, leaving the bodies to rot? Also many pack animals have also demonstrated themselves capable of bullying and enjoying the suffering of their own kind as you put it, such a baboons.Trivun said:Man's greatest enemy is Man. Because what other animal goes to war against itself, kills others for the sheer pleasure of it, and takes pride in the suffering of others of it's kind? Only humans. We claim to be better than animals, but people too often forget that we are in fact much worse...
OT: I'd say disease, probably the greatest takers of human life of anything.