Before you dismiss that thought, consider this: we are where we are because we have been where we have been. It couldn't have been any other way. The results would have been vastly different from what we see around us. Do you genuinely think we could have got to this level of complexity without the intermediary stages?
I agree completely with what you say here LT and that is why the crux of the question is on the 'where' (as a species). Of course there would have to be intermediary stages to get where we are now, though I also think if we would have just gone about things differently (i.e. the idea of God not even being thought of) we would be in a different place for a different set of intermediary reasons. Perhaps our advances would be less mechanical and more artistic, perhaps we would have sought space sooner, or later, or perhaps we never would have even got that far because without rocket technology we wouldn't have rockets and they came about due to a war and that war came about due in many respects to religion, so many of our advances come about from war and war is so often down to ideology and religion so often drives that, and so on, so I think the intermediary reasons are very important to where we are now, but since they are so heavily influenced, it is like imagining a 'could be' world that never existed.
I guess where I differ is that I just don't think we would be like shaking poodles if we didn't have the notion of God or a higher power, and I don't think it's a concept or feeling of God that made us venture beyond our caves anymore than I think God himself did, if there is one, I think that's just part of being human and given time we would always take that leap.
Maybe it would always be our nature to lean towards there being a supreme power, or maybe that idea was not a human creation but something someone from somewhere else gave us in an earlier stage of our development and that we in a less informed state took as true, maybe, maybe not, but it's possible, just like ill informed people takes on what JW's tell them as true when others say firmly it is not.