Wikipedia definitely has a thing for Euler diagrams[0], but this one is actually useful. Thank you very much! :) [0] https://en.wikipedia.org/wiki/File:Suprana

Wikipedia definitely has a thing for Euler diagrams[0], but this one is actually useful. Thank you very much! :) [0] https://en.wikipedia.org/wiki/File:Supranational_European_Bodies-en.svg https://en.wikipedia.org/wiki/File:Supranational_European_Bo...