Maybe with less sense of right-and-wrong, governments would have never formed and the human race would be seperated, fighting eachother to stay alive more than researching into more inportant matters like how to deal with hunger etc. I'm making a lot of assumptions here. I think It would help to know how the first goverments formed to see if Religion played much of a part.Therefore, in my opinion organized religion cannot justify the amount of atrocities that have occurred in its name with the good that has stemmed from it.
Lots of of atrocities have occurred in the name of religion, but would a world without religion have neccessarily seen less? I think the idea of a afterlife and gods overwatching us gave people moral, told them what's right and wrong etc.
Without the fear of gods punishing them, would people still have conformed and helped and done the "right thing" by their religous standards?