What economic developments does Roubini see on the horizon? And what does he think we should do about them? The first step, he told me in a recent conversation, is to acknowledge the extent of the problem. “We are in a recession, and denying it is nonsense,” he said.

The United States, Roubini went on, will likely muddle through the crisis but will emerge from it a different nation, with a different place in the world. “Once you run current-account deficits, you depend on the kindness of strangers,” he said, pausing to let out a resigned sigh. “This might be the beginning of the end of the American empire.”

The bigger they are...Just ask the Romans