Rķu rķu, chķu wrote:
For that matter, it's possible that the Orions are not unified into one planetary or interplanetary state. Maybe there are two or more Orion polities, with one that's more Federation-friendly and another that's more hostile?
Any world that wishes to join the Federation must be unified into one state ("Attached"). So if Orion is not so unified, then it can't be a member. Also, even if Orion is a member, then its practice of slavery would also not allow it in, as that would surely be forbidden under Federation law.
Oh, I'm not suggesting that any Orion polity is a Federation Member. Rather, I am suggesting that the Orion species may be divided between multiple independent polities, with one being perhaps more friendly than the other towards the Federation. A figurative interstellar East Germany and West Germany, so to speak.
However, I see no reason why a sovereign Orion polity that meets the other requirements for Federation Membership could not join. If there's, say, an Orion Union and an Orion Republic, and the Orion Union governs its own solar system, is a liberal democracy, protects the natural rights of all its inhabitants, bans slavery and caste-based discrimination, etc., whilst the Orion Republic is a slave-based oligarchy? I see no reason why the Orion Union could not join the Federation while the Orion Republic stays out.
Heck, there's already at least one species that's divided between two polities, one of whom is a Federation Member State and one of whom is not: the Vulcan species, the majority of whose members appear to be citizens of the independent Romulan Star Empire, but whose original population base are citizens of the Vulcan polity, which is part of the Federation.