Attached Link: http://www.trussel.com/prehist/news299.htm

You have to take several things into account. If MOST of humanity were hommiciadally cruel to children they wouldn't exist. If you'v ever gone "Awww" at picture of kitten... that's your genetic programing talking. While many animals can generate sound, only humans have developed the intricate language system. If whale songs were repeated, and the song outlived the first recorded singer of that song, that would be proof of information being passed on from generation to generation. Until that happes, there is no proof that the song contains any long term data, or that data is percived as language. The other feature of humanity is the ability to overwhelm our genetic responces with conditioned ones. I personally belive mankinds self destructive natrue is simple a housekeeping responce to our over population. We grow out of control, we get sick and die off to managable numbers again. As a population grows, there will always be an average number of mutation that change the rules. Criminal behaviour in many cases has been tracked to frontal lobe damage. Either post birth or genetic. We are also designed to be preditors. two eyes that face forward are solely there to "range" prey. Canine teeth exist to rip flesh and eat meat. We are Omnivours, so we don't have to kill ALL the time, but we are all designed to be killers. Society is the missing factor. No creature has developed a more complex society in the history of our world, and our social structure has become so prevelent that it is bound to be effecting our natural selection at this point. Even an animal can go "insane" where it act against it's nature of forms a fetish on a certain aspect of it's nature. We already live in age where scoial engeneering is practiced globally.