Today we consider the current debate about whether we need to return to fixed exchange rates and create a new reserve currency for the World – which might even be a supra-national currency. In general terms the calls for these sort of reforms reflect a misunderstanding of how a modern currency operates and also the opportunities the fiat monetary system presents to a national government which desires to advance public purpose (full employment and price stability). The claims for this type of currency reform also reflect serious misunderstandings about trade and the financial flows which accompany trade. More worrying is that the fixed exchange rate call is becoming a cause celebre for progressive economists who see flexible exchange rates as somehow a cornerstone of a neo-liberal free market plot against prosperity. Talk about being misguided. So this blog introduces these issues – and will probably be the first of several on the topic.