I think there's no excuse for the American poetry reader not knowing a good deal about what is going on in the rest of the world.
There are domains in which expertise is not possible. Stock picking is a good example. And in long-term political strategic forecasting, it's been shown that experts are just not better than a dice-throwing monkey.
Every great work of art has two faces, one toward its own time and one toward the future, toward eternity.

