We’ve been warned over and over that the Federal Reserve, in its effort to improve the economy, is “debasing” the dollar. The archaic word itself tells you a lot about where the people issuing such warnings are coming from. It’s an allusion to the ancient practice of replacing pure gold or silver coins with “debased” coins in which the precious-metal content was adulterated with cheaper stuff. Message to the gold bugs and Ayn Rand disciples who dominate the Republican Party: That’s not how modern money works. Still, the Fed’s critics keep insisting that easy-money policies will lead to a plunging dollar.

Reality, however, keeps declining to oblige. Far from heading downstairs to debasement, the dollar has soared through the roof. (Sorry.) Over the past year, it has risen 20 percent, on average, against other major currencies; it’s up 27 percent against the euro. Hooray for the strong dollar!

Or not. Actually, the strong dollar is bad for America. In an immediate sense, it will weaken our long-delayed economic recovery by widening the trade deficit. In a deeper sense, the message from the dollar’s surge is that we’re less insulated than many thought from problems overseas. In particular, you should think of the strong dollar/weak euro combination as the way Europe exports its troubles to the rest of the world, America very much included.

Some background: U.S. growth has improved lately, with employment rising at a pace not seen since the Clinton years. Yet the state of the economy still leaves a lot to be desired. In particular, the absence of much evidence for rising wages tells us that the job market is still weak despite the fall in the headline unemployment rate. Meanwhile, the returns America offers investors are ridiculously low by historical standards, with even long-term bonds paying only a bit more than 2 percent interest.