I've recently read and reviewed a book from Princeton University Press entitled HOW GLOBAL CURRENCIES WORK, by Barry Eichengreen, Arnaud Mehlm and Livia Chitu. Two of those authors are affiliated with the European Central Bank. I won't discuss here the main thesis of the book, which I summarized with my usual panache in my review for AllAboutAlpha. Instead, I'll take up a subsidiary point: the role of the Japanese yen on the world scene. There was a time when Japan was seen as the rising economic superpower. If through the 1970s and 1980s, a random individual of average intelligence and just slightly above average interest in following the world's financial news had been asked, "Is the US dollar going to remain the world's central currency for a long time yet and, if not, what might be its replacement?" that person's answer might well have been, "no it won't, and the yen will replace it." But the yen didn't. Nowadays it is ...