"Unchecked, such a debt spiral raises the specter of a crisis. Some may think that such concerns are overblown, as there is no current evidence in financial futures markets that a crisis is on the horizon. But a debt crisis does not come slowly and visibly like a rising tide. It comes without warning, like an earthquake, as short-term bondholders attempt to escape fiscal carnage. Only in hindsight are we able to see the stresses building and bemoan that we did not act. While some insulation flows from the dollar’s role as the global reserve currency, that is neither sufficient nor immutable, and relies on faith in the United States’ eventual fiscal probity."