I have often debated this idea with people. I believe that, since we are all products of Darwins great 'evolution/natural selection' (I hope everyone understands at least something about this biological theory) that every single thing we do, all of our behaviour has some evolutionary advantage. In other words, every thing we do is (over some time-scale) calculated subconsciously to be conducive to the replication of our genes. I have never read Dawkings 'the selfish gene) but I understand what its about and Im sure some people out there will provide input from it. Is there anyone that can debunk this theory?