"Europe exemplifies a situation unfavourable to a common currency. It is composed of separate nations, speaking different languages, with different customs, and

"Europe exemplifies a situation unfavourable to a common currency. It is composed of separate nations, speaking different languages, with different customs, and having citizens feeling far greater loyalty and attachment to their own country than to a common market or to the idea of Europe." Milton Friedman, The Times, November 19, 1997 https://en.wikipedia.org/wiki/Optimum_currency_area https://en.wikipedia.org/wiki/Optimum_currency_area