In searching about morality, I notice that religion is described as something that was beneficial to societies from an evolutionary standpoint.
“The adaptive value of religion would have enhanced group survival.” ~Wikipedia: Evolution of Morality
This makes sense. If you frighten people of a common scary consequence, they likely would work together better – especially if they can’t debunk the fear. In the past, I can’t imagine many other things bringing people together so well, aside from the threat from a nearby hostile society.
Now, looking at how developed nations tend to be letting go of religious belief, I suspect that demonstrates how traditional religion is losing its usefulness. We don’t need to be scared of a vengeful God any longer to band together. Enough of us are realizing how silly of an idea it is, and we have more reality-based issues to band together over now and the abilities to do so.
Though, some of those reality-based issues do end up developing questionable narratives not unlike traditional religions.
It will be interesting to see where things might lead from here.