Farmer, if we can find the genes that make people murderers etc and change them into something good, then I think that it is worth looking into. As abortion is a way of getting rid of unwanted offspring, is this also not a form of culling ? Are you against abortion too ? Remember, before you take the moral highground and make personal comments. that we all make reprehensible moral choices in order to maintain our living standards. For example if you drive a car, you are sanctioning the tradeoff between the number of people who get killed on the roads and getting from A to B in a time that suits you. If we all drove at 4mph there would be no road deaths. Again, look at how many people are killed in our quest for oil. The issue is complex and deserves far more thought than your trite response.