Back to the topic of the Federation. I would like to suggest that it's possible the organization, structure and responsibilities of the Federation grew and adjusted from ENT (where we saw the founding) to TOS to TNG and beyond. After all the United States government founded in 1776 was different from the one that ratified the Constitution in in 1787. While the government in 1776 was called the UNITED States (originally the United Colonies) the supreme law of the land was called the Articles of CONFEDERATION. The US even had a different president who preceeded George Washington.
No, it did not. Rather, under the Articles of Confederation, there was a position entitled "President of the United States in Congress Assembled." However, "the United States in Congress Assembled" was the formal name of the Congress under the Articles. In other words, the Presidents of the United States in Congress Assembled were not the heads of state or heads of government as the current President of the United States of America is. Rather, they were the presiding officers of the legislature -- equivalent to the Speaker of the House, President Pro Tempore of the Senate, or Speaker of the House of Commons in Great Britain.
You are correct in noting that it is entirely possible that the scope of the Federation's authority may have fluctuated throughout its history. Indeed, that is the most probable scenario -- even under the US Constitution, the scope of the US federal government's authority has fluctuated over the ages, going up and down depending upon how each generation interpreted the Constitution and the principles of federalism.
Interesting side note about the Constitution/Articles: Depending on who you talk to, some would argue that the United States of America that exists today did not actually exist until the Constitution was ratified. Rather, they would argue that the United States of America that existed prior to the Constitution was a separate legal entity, a mere alliance of sovereign states that ceased to exist upon the adoption of the Constitution, which created a genuine state in its own right.
Personally, I would tend to interpret the situation as being analogous to the Coalition of Planets. The Coalition as Our Heroes' attempt to create an alliance of sovereign worlds that later proves untenable, with the United Federation of Planets being established to create a sovereign state in its own right to unify those formerly sovereign states.
Ergo, when treating the Federation within the context of the fictional universe it inhabits, we have to treat it as a state.
But if enough contradictions to that exist, then it shouldn't be too difficult to accept that the UFP could be something other than a state,
and something other than a federally or confederally tight or loose cooperative of states. A descriptive approach to analyzing this futuristic construct might be better than one that tries to fit it in assorted historical molds.
Well, I don't think enough contradictions exist. To me, the overwhelming preponderance of evidence is in favor of the Federation being a state in its own right, and the few contradictions that do exist there can be rather easily reinterpreted. It's much easier to creatively reinterpret "Journey to Babel" than it is to reinterpret the five thousand other pieces of evidence for the Federation's out and out statehood, IMO.
As for "Vulcan exhile" -- what makes you think that the Vulcan government even knew that Kirk and Co. were at Mount Seleya? It's entirely possible that the Vulcan government no more knew they were hiding out there than the State of Montana knew that the Unabomber was hiding out in their state.
To operate a starship from a starport, no matter how much a "dirt strip", would seem to be an operation any government would like to be aware of if it happens on their dirt... And one would assume Vulcan keeps at least some sort of public eye on its celebrities such as high priestesses. But it could always be argued that this eye was deliberately turned away, and that Vulcans simply kept saying "No, absolutely no Earth fugitives here - would we lie to you?"...
True enough as well. If the government of the State of Montana had wanted to hide the Unabomber from federal officials, I've no doubt that they could have done so, too. Arguing that Vulcan was sheltering Kirk and Co. does not necessarily say anything about the structure of the UFP.
On the other, other hand, the fact that Kirk & Company can have a "Vulcan exile" in the first place, that they have to volunteer to return to Earth rather than simply being arrested and/or extradited, and that Sarek is Ambassador
to the Federation (rather than, say, a member of the Galactic Senate

) implies that Vulcan is a sovereign state in this situation, which can harbour fugitives if it so chooses.
That has more to do with shifting creative intent than anything else. It's fair to say that, originally, the Federation was meant by the TOS writers to be more of a "UN in space" kind of deal -- hence Sarek being "the Vulcan Ambassador" (his full title is never given, though -- we don't know if he's Vulcan Ambassador to the Federation or Vulcan Ambassador-at-Large, or even if "the Vulcan Ambassador" is his actual title rather than a nickname) and Ambassadors of Federation Member States getting the say over whether Coridan joins the UFP in "Journey to Babel."
I don't think that Spock would've referred to performing actions "at the behest of the Vulcan Ambassador" in a formal briefing to Starfleet Command if all that was meant by the term was "the ambassador who's Vulcan." If nothing else, the term would've been too vague in that context.
Maybe, maybe not. Depends on just how famous and widespread such a nickname might be.
Another possibility, of course, is that perhaps Federation Councillors were originally styled "Ambassadors" because the Federation was originally intended to be a looser organization than it evolved into. Another possibility is that it was always intended to be a state, but one with a strong form of federalism, and that ergo the stylistic trappings of sovereign states were originally retained, in much the same way that, even today, you sometimes hear people refer to "the sovereign State of Ohio" or the "sovereign Commonwealth of Massachusetts."
But over time, the creative intent has rather obviously shifted to the idea of the Federation as a state in its own right. Ergo, when treating the Federation within the context of the fictional universe it inhabits, we have to treat it as a state.
I would agree with
Timo that various pieces of evidence point to a structure for the Federation which doesn't fit neatly into a present-day analogy as the most likely explanation, and that you're deliberately ignoring such evidence or glossing it over with your thoughts on "creative intent" and interpretation of "Journey to Babel."
No, I'm deciding what I think the preponderance of evidence indicates and then creatively reinterpreting seemingly contradictory pieces of evidence. You know, like we do in Trek Literature
all the time.
But the Federation possesses all of the characteristics of a state. It has a definite territory over which it rules ("The Best of Both Worlds," numerous DS9 episodes referring to "Federation space"). It has the legal power to create binding law within that territory ("Force of Nature" [TNG]). It is recognized as having legal authority over its population and to conduct foreign affairs on the behalf of its population by other states ("Errand of Mercy" [TOS],
State Trek VI: The Undiscovered Country). It has a government, including a legislature called the Federation Council ("Amok Time" [TOS], "Force of Nature" [TNG]), an executive officer called the President of the United Federation of Planets (
Star Trek IV: The Voyage Home) who is the commander-in-chief of the Federation military ("Paradise Lost" [DS9]). It has a judicial system of its own, including grand juries ("The Ascent" [DS9]) and a Federation Supreme Court that is the court of last resort for Federation citizens ("Dr. Bashir, I Presume?" [DS9]). It has its own monetary unit, the Federation Credit ("Mudd's Women," "The Trouble With Tribbles," [TOS]), it has its own military in the Federation Starfleet ("Court Martial" [TOS]), and it has the successful monopoly on the use of legitimate violence (numerous episodes). It has a law enforcement agency called Federation Security (
Star Trek III: The Search for Spock) and its military officers are empowered to enforce Federation and local law ("Let He Who Is Without Sin..." [DS9]). Its Constitution grants all sentient beings living under its jurisdiction protections for a set of rights ("The Perfect Mate" [TNG]), its Charter overrules local law and even Federation laws, marking it as the supreme law of the land ("Accession," "
Inter Arma Enim Silent Leges [DS9]), and its government is capable of declaring martial law and overriding the authority of its members ("Home Front"/"Paradise Lost" [DS9]). It has an extensive bureaucracy and civil service, including a Bureau of Agricultural Affairs ("The Trouble With Tribbles"), a Bureau of Industrialization ("The Cloud Miners" [TOS]), a Bureau of Planetary Treaties ("The Mark of Gideon" [TOS]), a Central Bureau of Penology ("Dagger of the Mind" [TOS]), a Department of Cartography ("
Inter Arma Enim Silent Leges" [DS9]), a Department of Temporal Investigations ("Trials and Tribble-ations" [DS9]), a Federation Naval Patrol ("Thirty Days" [VOY]), a Federation Science Council ("Force of Nature" [TNG]), a Federation Science Bureau (
Star Trek II: The Wrath of Khan), Terraform Command ("Home Soil" [TNG]), a Federation Astronomical Committee ("Eye of the Needle" [VOY]).
In short, the Federation possesses all of the traits of a state. What few things can be claimed to be inconsistent with that concept are fairly weak -- styles of address, and procedural differences during what is described as a time of extreme crisis. Seems to me that the logical conclusion is that the Federation is a state, as we understand a state, in its own right -- albeit one with far greater commitment to local government's rights and autonomies than we oftentimes find in real-life federations.
As for "Vulcan exhile" -- what makes you think that the Vulcan government even knew that Kirk and Co. were at Mount Seleya? It's entirely possible that the Vulcan government no more knew they were hiding out there than the State of Montana knew that the Unabomber was hiding out in their state.
The various parties speaking before the Federation Council seemed to have a pretty good idea of what happened in
Star Trek III (complete with footage of the
Enterprise's destruction

), even if the Klingon Ambassador had the wrong impression of who detonated the Genesis Device,
So? Knowing what transpired in one star system does not tell you what happened later on in another. It was an established fact that Eric Rudolph attacked the Olympic Games in Atlanta in 1996, but it still took years for authorities to figure out he was in North Carolina.
and it would seem strange to me for him to ask for the extradition of someone whose location was still unknown.
Not if the Klingons' intent was as much to embarrass the Federation as anything else. "We DEMAND that you extradite this CRIMINAL who so blatantly attacked innocent Klingon citizens!.... What? What's this? You don't even KNOW where he is? What kind of government are you running here?"
I'd be very surprised if they knew that the Klingons destroyed the Grissom and killed David Marcus; and that Kirk blew up the Enterprise, killed (most of) that Klingon crew, and stole the Bird-of-Prey; but somehow didn't know what happened afterwards,
I can completely buy that. Kirk would probably want to tell them what happened in order to avoid an interstellar incident. Send out a subspace probe with the data on it, activate the cloaking device, and go about your merry way as a fugitive from justice.
when he's talking to Sarek, one of the people (a "celebrity," to use Timo's term, and a representative of that government) who met up with them then.
All that that means is that Sarek is a participant in a criminal conspiracy to hide Kirk and Co. from justice.
I believe it might have been in Sarek's and Vulcan's interests to obfuscate somewhat, though. Perhaps it was never quite officially admitted that the fugitives were on Vulcan soil - so the issue was not an internal one of denied or disputed extradition from Vulcan to Earth or Vulcan to Federation, with the implications of disunity, but a purely external one of extradition from Federation to Klingon Empire, with some dishonesty involved as to where in the Federation the fugitives were hiding.
Exactly.
As for the title of "Vulcan Ambassador", we might choose anything between clinging on to the exact meaning of "Ambassador" today and deriving the structure of the UFP from there (by using "Journey to Babel" and ST4 evidence), and clinging on to the exact meaning of a "Federation" and deriving the UFP structure and the possible role of Ambassadors from there. In the latter case, we'd then probably have to accept that "Ambassador" in the 23rd century means something like "Senator" or "Secretary/Minister" in the 20th...
...Which wouldn't be that much of a leap, considering that "Minister" in the 18th-19th centuries used to mean more or less exactly the thing we now call Ambassador, right? That is, we'd have had a Minister of Vulcan in the putative 18th century Earth government, him being the human from Earth responsible for doing diplomacy with Vulcan.
Timo Saloniemi
The usual term was actually "Minister Plenipotentiary." It's the "Plenipotentiary" bit that marked them as being empowered to represent their state to another. Meanwhile, there were Ministers of State who performed the same functions that Ministers in parliamentary governments do today -- Defense Minister, Foreign Minister, etc. I.E., the heads of executive departments.