Are We Not Looking at a Future for the Planet That Is Essentially Religious?

Are we not looking at a future for the planet that is essentially religious? I think the answers we don't know. One analogy i've thought of than maybe we've discussed in the past, is secular urban societies as being like big cities used to be in the pre modern age. It was a kind of population sink. And one possible sonario is that these communities do continue to exist, but that they pump people out em and those people man the secular society. So that's one possible model. But by studying demography, we can at least ask these questions and start looking around and start debating them.