Animals get along just find without "understanding" everything, and yet here we are trying to. WE function the same way, eat/sleep/live but our dam brains push us to want more. So we sit here are bash our heads on the wall (or perhaps other people's heads) trying to "understand"(through religion). most often than not we end up not understanding anyway. Therefore the human brain is curse to humanity. We should not be asking the question why arn't other animals like us but why are we not like other animals.