I have an 80 page essay proving that it would be easy and indeed probable for the entire existance of the universe to stem from the universal constant a number which is at the centre of every single law in the known universe. Therefore gods only role would be to set a number which is already preset by the rules which it governs.
Lets say you view every law on a 3d graph (one with 3 axises) and you only label two of them X and Y across these axises you plot laws and percentages that they can change to function in our universe sucsesfully without bad consequences (usually 2-3%) the other axis (Z) will auromaticly follow the universal constant, it works in reverse too.
However the best explanaton for the non existance of god comes from the hitchhikers guide to the galaxy (the autor used to live across the road from me and his widow lives in the house now)
'The argument goes something like this: "I refuse to prove that i exist" says god "proof denies faith, and without faith i am nothing."
"But," says man "the babel fish is a dead giveaway isnt it?It could not have evolved by chance. It proves you exist, and therefore by your own arguments you dont."
"Oh dear" says god "I hadnt thought of that" and promptly vanishes in a puff of logic.'