Maybe we need a global euro

It's been a while since I last wrote - I guess I had nothing more to say about the worst US presidency to date, and thank goodness he's gone and we now have hope for better. My latest interest (among many, actually) is currency, and that is what I will begin writing about - basically my thoughts about the need for a world currency, replacing all national currencies, something that John Stuart Mill wrote about as long ago as 1851.