There are no *rational* (ie, data-based, empirical) reasons to believe in anything supernatural, or "greater" or "higher" or anything semantically related to the god domain. That's why it's so much fun when they try things like intelligent design... Show me someone who regards "the theory of" evolution as yet not proven one way or another, and I'll show you someone who does not understand basic science. And there are no data *for* creationism in any guise. The evidence is overwhelmingly in favor of "just happened" over "was made." Insisting that that isn't the way it actually is is silly, and trying to teach it as science in schools is dangerously foolish.

Of course in science-speak you can't say a "theory" is ever "proven" but evolution, natural selection, and even punctuated equilibrium by now are as firmly established as the "theory" of gravity, the "theory" of plate tectonics, or the "theory" of relativity, or any other model that describes the known world. Which, of course, doesn't mean that god didn't make it that way. You can't disprove god, no arguments there. That is not evidence in favor of their being any, it's just a fact of logic.

We know a great deal about our own species' evolution. What I like best is that mitochondrial Eve is about 150,000 years older than y-chromosomal Adam! Chew on *that* one for a while!