At the end of a year in which the dollar has endured a marked decline against other currencies, an unsettling question is beginning to be voiced: can the troubles of the US currency be confined to the financial world or are they set to undermine Washington’s place on the international stage?

“This is the neglected dimension of the dollar’s decline,” says Flynt Leverett, a former senior National Security Council official under President George W. Bush. “What has been said about the fall of the dollar is almost all couched in economic terms. But currency politics is very, very powerful and is part of what has made the US a hegemon for so long, like Britain before it.”