1. What else would I have been referring to? Tell me, because freedom of speech is such a universal concept in liberal democracies, as is the right of protest.
2. I cannot prove a negative, but I can say that the defined-role-only model of the 10th amendment is the only example of it's kind I know of.
I have attempted to find contrary examples, but encountered none.
I guess nobody raised the question as to the uniqueness of the concept or implementation.
3. Sovereignty is absolutely relevant, regardless of interconnectedness.
Anyway, back to the real issue at hand:
I still believe the Federation is a union modeled on the UN, as all of the member worlds seem to have their own political structures, and there are mentions of member worlds being in charge of themselves.