Dear Outrider,
Absence of belief!
We have been worshipping gods since Paleolithic times, I don't think we ever have had a absence of belief, its in the genes.
Gonnagle.
We have worshipped many things - nature, the sun, disembodied conceptual personalities... We have attempted to pacify that which we could not control or which we did not understand, and ritual behaviour has been part of that. That's culture, but we are not born with a particular culture, we are shaped into it.
The tendency to see agency where there is none, it seems, does have an inherent basis - that tendency to recognise patterns is part of why we develop conceptual thinking and language, but as with any 'test' there is the possibility of false positives.
We are also social creatures, and so ideas are communicated, shared and multiplied not necessarily in proportion to the evidence, but in proportion to the cultural appropriateness: religion was appropriate in primitive societies, and becomes increasingly less so as we increasingly have evidence to support better explanations.
That we have a tendency to believe makes us human, it doesn't make gods true.
O.