I don't pretend to even be close to sorting all this out, but a few things seem pretty obvious to me. First of all, mankind has only begun to scratch the surface in understanding and comprehending the complexity of the universe. I can't get around the fact that, where ever you look, that complexity appears to be by design and purpose, which to my mind says, inteligence. To say that everything we see or know about has come about purely by some blind accident, belies every thread of logic I can muster. I can't think of anything else we might encounter in life, to which one would apply that same sort of reasoning.
So, does that mean I believe "God" created it all? For any answer to that question to mean anything, one would first have to define who or what "God" is. I can't bring myself to believe that the entity described in the Bible is anything more than the perception of some supreme diety, held in the minds of certain ancient peoples. I'm not convinced a "God", as defined in any traditional religeous context, actually exists. However, the evidence of inteligence and purpose in what we commonly term "creation", certainly can't be ignored. Even the doctrine of "natural selection" implies a rational purpose to the evolutionary process. So, the idea that we, and the universe, have arrived at our present state through an evolutionary process, designed and initiated by an entity of inteligence and power, seems quite possible and rational to me. As far as whether or not, or to what extent, that entity would take an active interest in the everyday affairs mankind, individually or as a whole, I really don't have the foggiest idea.
But, that's just me!