IMHO, intergovernmentalism and supranationalism do not need explanations of those terms, they can click on the links to look into that and the article should speak for itself on detail. GDP should be mentioned as it reflects its importance and clout in the world - to change any misconceptions about its importance. Don't care much where it comes in though. Some history could be good but kept brief as it can easily get long winded with the different treaties - maybe just that it has its roots in the ECSC founded in 1952? History is a good context to start talking about something, the era of establishment -and age- reflects its nature and so on. On the established consensus, that should be stuck to till a new one is formed, all parties should refrain from amending the text without getting support here or we just decent into the edit wars which stop this page progressing.-  t: