Why would you need religion to establish basic pillars of morality when those are tied directly to our nature and to logic? We want to survive above all else, thus we stay in groups which makes survival easier and establish rules like "don't murder" or "don't steal" because doing that jeopardizes the survival of the group.
It's as simple as that and the fact you need a book to tell you not to do those things just tells me you are retarded.