I also prefer the word institution or corporation or some such so that we can talk about the phenomenon of organisation without confusing it with the specific entities we are talking about. I think, however, that the idea of roles and clarity of roles may not be appropriate for full development of organisational intelligence. An institution comes into existence from patterns of such committed speaking and listening where there is a recognised identity. Accidental or temporary commitments to not make a corporation. This approach, I think, has most of your great questions retain their relevance and maybe some new ones emerge.
Intelligence is the underlying organisational principle of the universe.