The European Union is not yet a super-state or it can't go fully super-national but it's also no longer the classical post-war nation state that we knew from the 50s and 60s. I should add just to be a bit more concrete on this issue of the European state or the EMU not requiring a truncation of democratic states to actually work  the main issue that people pointed out at the time was essentially the tendency of politicians to conduct economic policy in line with their election cycle. i think very important to understand europe at it currently is as asked to see which economic thought at theTime was ascendant and i think the early 90s were that.