Fanatics of either religioius or scientific persuasion are likely to kill us. Science will often pursue research which produces ethical problems and religion can hinder research by imposing their own religious views on the general public. In fact, given the mess we are in, we must look to science for our future survival, and religion for ....; well I can't think of anything, but for some people religion may help regulate their more anti-social behaviour, though personally I doubt it. However it is the dogmatic (great word rede) fanatics of any points of view that cause problems I feel.