The urge to believe

Man's urge to believe in religion has always puzzled me. This urge crosses all time, geographical, and cultural barriers. Seemingly every civilization in history has had religion. But why? We all feel hungry so we all eat. Seems simple. At some point the organisms who felt hunger were able to eat, survive, and reproduce more than the others. What about religion makes it an evolutionary advantage? Based off the amount of wars religion has caused, it would seem to be the opposite of an advantage. Yet as civilization has gone from lighting fire in caves to putting someone on the moon, people have also wanted to believe in something spiritual. Is this urge to evolutionary but instilled in us by a creator? If instilled by a creator, why different answers to the same question?