Commentary 
Sure, you can say that only a few people are openly talking about one. The latest headline from the World Bank adds to a small list of official warnings. Everyone else in authority remains relatively sanguine, at least outwardly. But that’s how these things start.
Not too long ago, the word was taboo. Then a brave few actually said it. Today, it’s still only a few more, but already you can begin to feel the snowball advancing down the wet, hoary slope, where it will inevitably pick up weight and speed dangerously toward its ultimate end.
What is this thing?…