the egg came first (obviously), and God exists or doesn't exist depending on what your definition of God happens to be (there are many names and forms, stories and myths, etc all attributed to that which we refer to as "God"). even within a single religion (or any "ism", including atheism) people ideologies about what God is/isn't starkly contrast. therefore the whole idea of proving it (whether or not there is a God) is pointless.

and it has to be stated that even though evolution has a lot of support to back it up, it remains to this day only a theory. so the only thing standing between an atheist and a monotheist or a polytheist is their belief, or faith. Do you believe in evolution?

Now, if something has been disproved (such that the earth is only 6,000 years old or something) it would be silly to continue to believe in it.

just my two cents.