There seems some confusion on this point. Some say "civs that don't have a religion yet must be athiest." Others say "atheism didn't exist even before civilization, civs should start in a sort of "pagan" religion."
Personally I would side with the latter. Humans have historically turned to religion when faced with the unknown, and for a large part still do. It is only as we enter a new age of knowlege can we reason our way to a non-supernatural conclusion, something impossible for ancient agriculturalists.
Personally I would side with the latter. Humans have historically turned to religion when faced with the unknown, and for a large part still do. It is only as we enter a new age of knowlege can we reason our way to a non-supernatural conclusion, something impossible for ancient agriculturalists.