The human brain is too prone to delusion, hallucination and the inability to tell the difference between them and reality.
This begs the question why? I think that religious belief has conveyed an advantage over the (tens) thousands of years that humans have had some form of religious belief. Long enough perhaps for natural selection to take place. Almost every civilization had a religion of some form. Did society come first or did religion? Well since primates are societal creatures I think it's safe to assume that religion came later. So then what happened? Did the religious early humans elimate nonreligious early humans? Did nonreligious early humans see an advantage and adopt religion?
I think that certian beliefs like a belief in an afterlife do give certian advantages to a group. If one believes that one will live on past this life then they would be less afraid to give one's life for their group, and others would be less traumatized by the loss if they believed that this person was alive somewhere else. With all else being equal this would give a society a big advantage over one that doesn't believe in this way, obviously religious cavemen couldn't defeat athiestic spacemen with deathrays. Then there is a curious correlation between religiousness and birth rates. Some that are born to religious parents do not stay religious, but the religious tend to have higher birthrates than nonreligious.
Anyway I think that yes the world could, but I also think that religion has conveyed an evolutionary (societal, and perhaps human too) advantage that needs to be investigated.