A bloke named James Jordan asked me to prove god doesn't exist. Well, see, I already did that in a previous post, but I've a better argument up my sleeve. One that actually uses science, and is much more conclusive than my previous disproof of god.
The scientific method involves formulating a falsifiable hypothesis, then attempting to falsify it. Now, of course, the Christian god is unfalsifiable (as are all gods that have not been outright falsified) so we could stop there, but I'll be exceedingly generous to my opposition here.
Anyway, the null hypothesis (general default position) is tested against the hypothesis. This works for the existence of any biological species, natural phenomenon, causal or statistical relationship, etc. For example, if the hypothesis is that blueberries increase sexual potency, the null hypothesis would be that they don't. The null hypothesis is always a negative, the hypothesis is a positive, & the burden of proof is on the one making the positive claim. If the positive claim cannot be proven, the null hypothesis is the better one.
So, theism, the positive claim, is the hypothesis, and atheism is the null hypothesis. We could word the hypothesis in such a way to allow for any god or gods to exist. As an example: "The universe, and all energy in it, was created from nothing by an intelligent agent." Note that "energy" here includes all forms of matter. The null hypothesis would be something along the lines of "the universe and all energy in it always have existed".
OK, so now that that's set up, you, the one pushing the god hypothesis, have to prove there is a god of some sort. You can't. You've been trying for all of human history, and the best you can do is "well, something has to have caused everything, why not my god?" You even had to invent the concept of faith (believing what you don't have compelling evidence for, otherwise known as "the stupidest idea ever") then make it a virtue in order to preserve theism as a widespread phenomenon. And since you can't do this basic thing, atheism, the null hypothesis, stands as the dominant theory.
There. Atheism has been proved, at least until you bring some real powerful evidence to disprove it.