Arguably, the absence of God makes morality obsolete, although plenty of atheist philosophers argue otherwise, and plenty of non-raping and non-killing atheists show otherwise in practise. Even if one accepts that we need God to define morality absolutely, that does not mean we need an ultra-meddling God who labored over the design of each species, and labored to create a false record of sedimentation, fossilization, etc.
A personal morality and situational ethics are totally insufficient to restrain the basest instincts of man. This is what we saw in the 20th century and this is what we see in many of the ugliest behavior of modern times. Look what is going on in what used to be called Souther Rhodesia now. The theory of survival of the fittest, of might makes right is totally destroying the country and resulting in the starvation of those for whom the murderous agenda is supposedly being carried out.