click click eck eck eck

so earlier on today i was trying to think of societies or civilizations past or present that may have existed without some form of religion. i didn't think of any so i deduced that human society needs some form of religion to exist. now i personally have no religion, not having been brought with any, but i think maybe on a grander scale. so then i started to wonder about the size of my brain and what that means in terms of intellect, say compared to a dolphin or whales. now i know that dolphins have an understanding of self, and time. they have a spoken language and names, live in a hierarchal society (this was told to me, so i can't verify the truth of it) etc.... do they have societies without religion? if they do have religion what do they worship? mightn't it be possible that i am a dolphin god? shin, the mighty god of click click eck eck eck.