[in response to an email from a reader of this essay]
But in answer to your question — “isn’t this a better state of affairs?” — I’d like split the question into two vectors.
Is it better for us, for American Christians? In many ways, yes. Being severed from the arrogance and complacency that afflicted us in the Constantinian era is usefully humbling. (By the way, I too like Lewis much better than Niebuhr, and I think a main reason for that is that Lewis knew he was living in a post-Constantinian world and Niebuhr didn’t.)
But is it better for the world, for the saeculum? I tend to think not. What the Athenians said to Paul on the Areopagus (“We will hear more from you about all this”) is a heck of a lot better than what we hear from Rorty (“The theists can talk, but we don’t have to listen”). Sometimes, at least, people who pretend to listen can end up actually listening; but if they refuse to listen at all I don’t know how they can be reached.
So we need to be always striving to find ways to be heard without thinking that we’re owed a hearing.