Interesting question. Perhaps a world without religion might occur in our future, but religion was inevitable in our past for at least two reasons:
1. We are wired that way: Our brains naturally seek explanations for events. So, for example, when our pre-scientific ancestors (who had no knowledge of atmospheric temperature and pressure differentials or static electricity) saw brilliant flashes of light in the sky and heard loud "booms," Thor in the mountains pounding away with his hammer seemed as likely an explanation as any. Supernatural explanations for nearly every natural phenomena are plentiful in our history. Every culture and religion has them. Every one.
2. We are wired that way: Humans are social animals. We have always lived in groups ranging from the small family unit to the tribe and eventually on to larger social structures. As is observable in any group of animals with a social structure--from baboons to wolves to chickens--there is always some sort of hierarchy. Humans are no different in this regard. Someone always wants to be the top-dog or Alpha male. Most are content to be followers. Religion provides a convenient justification for this arrangement. This is true in every culture and religion. Every one.
The only way forward, as I see it, is to promote universal, science-based education for everyone and to strive toward creating a more egalitarian society for all. For that to happen, religions would have to go away--at least as they presently exist.
I am first and foremost a scientist, but I am also a student of history and human behavior. Because of this, and being the pragmatist that I am, I can only say this to the proposed end of religion: Good luck with that!
