Paul Krugman is an economist and a columnist for the NYT.

These are interesting times — and I mean that in the worst way. Right now we’re looking at not one but two looming crises, either of which could produce a global disaster. In the United States, right-wing fanatics in Congress may block a necessary rise in the debt ceiling, potentially wreaking havoc in world financial markets. Meanwhile, if the plan just agreed to by European heads of state fails to calm markets, we could see falling dominoes all across southern Europe — which would also wreak havoc in world financial markets....

In fact, policy makers seem determined to perpetuate what I’ve taken to calling the Lesser Depression, the prolonged era of high unemployment that began with the Great Recession of 2007-2009 and continues to this day, more than two years after the recession supposedly ended....

For those who know their 1930s history, this is all too familiar. If either of the current debt negotiations fails, we could be about to replay 1931, the global banking collapse that made the Great Depression great. But, if the negotiations succeed, we will be set to replay the great mistake of 1937: the premature turn to fiscal contraction that derailed economic recovery and ensured that the Depression would last until World War II finally provided the boost the economy needed....