One of my favorite Authors Ernest Becker talks a lot about this in his book Escape from Evil.
http://www.amazon.com/Escape
"Since men must now hold for dear life onto the self-transcending meanings of the society in which they live, onto the immortality symbols which guarantee them indefinite duration of some kind, a new kind of instability and anxiety are created. And this anxiety is precisely what spills over into the affairs of men. In seeking to avoid evil, man is responsible for bringing more evil into the world than organisms could ever do merely by exercising their digestive tracts. It is man's ingenuity, rather than his animal nature, that has given his fellow creatures such a bitter earthly fate (pg. 5,Becker)."
