The decline of institutional Christianity over the last 40 or 50 years has empowered a side of American religion that has always been there. The sort of do-it-yourself, "create your own Jesus" kind of faith. But, the forms that faith takes do have a real reason they are so appealing.

Our culture has few taboos that can't be violated, and our establishment has largely given up on setting standards in the first place. Except where Islam is concerned. There, the standards are established under threat of violence, and accepted out of a mix of self-preservation and self-loathing. This is what decadence looks like: a frantic coarseness that "bravely" trashes its own values and traditions, and then knuckles under swiftly to totalitarianism and brute force.

The decline of institutional Christianity over the last 40 or 50 years has empowered a side of American religion that has always been there. The sort of do-it-yourself, "create your own Jesus" kind of faith. But, the forms that faith takes do have a real reason they are so appealing.

I think it is very clear that, though great difference remained, evangelicals moved closer to Catholics, mainline Protestants and evangelical Protestants moved closer together, and this convergence coincided with greater institutional strength for all the Christian churches than, for the most part, you see today.

Independent of the critique I'm making, I'm just trying to paint a more comprehensive portrait of American religion than you get from a right versus left, religious conservatives versus secular liberal, believer versus atheist, binary. Too often, we just look at religion in America through that kind of either/or lens. I think it's much more complicated than that.

Many things about American life, that even secular people consider good, have flowed from the presence of a robust, resilient institutional Christianity.

It's clearly the case that there's not some moment in American history when every evangelical is holding hands with every Catholic who is holding hands with every mainline Methodist, or what have you. Obviously, American Christianity was deeply divided in all kinds of ways at mid-century too. But there was a kind of convergence going on. Even though Reinhold Niebuhr, the great mainline Protestant theologian, didn't think highly of Billy Graham, he and Graham still, clearly, had more in common, both theologically and in their attitudes toward religion in public life.