To me it seems pretty obvious that it is, but there are some inconsistencies in various plots that make it kind of a fuzzy issue. It's mostly early TNG, so I dismiss it out of hand, but lets look at it a little more closely.
I look at Starfleet as pretty much being THE military of the Federation, but that doesn't make the Federation militaristic. It doesn't make Starfleet's mission any more belligerent. It is there not to impose its will, unlike most militaries in history. That is why the Prime Directive establishes its character. It still exists for defensive purposes just as much as for discovery, and sometimes these things coincide. I would also think that, with its mission and humanity's evolved sensibilities, that there isn't a stigma about the military itself. I think the best thing about Starfleet is that it is a place where everyone works together, so that there are A type personalities to command the ships, while they work with and encourage the scientists they have with them.
I think that keeping other powers from interfering with the Prime Directive in Federation territory is one of the primary defensive missions of Starfleet. I also think that the rationale for the non-military professions inside of Starfleet is not as great as in the real world. In a United Federation that is led by high ideals, it comes down to a simple acceptance of all these things for those that choose to go into Starfleet. So basically I think that if we assume that disease, poverty, and domestic strife have all gone away, it isn't that much of a leap to assume that the Starfleet is overwhelmingly in support of whatever mission it is required to do.
I look at Starfleet as pretty much being THE military of the Federation, but that doesn't make the Federation militaristic. It doesn't make Starfleet's mission any more belligerent. It is there not to impose its will, unlike most militaries in history. That is why the Prime Directive establishes its character. It still exists for defensive purposes just as much as for discovery, and sometimes these things coincide. I would also think that, with its mission and humanity's evolved sensibilities, that there isn't a stigma about the military itself. I think the best thing about Starfleet is that it is a place where everyone works together, so that there are A type personalities to command the ships, while they work with and encourage the scientists they have with them.
I think that keeping other powers from interfering with the Prime Directive in Federation territory is one of the primary defensive missions of Starfleet. I also think that the rationale for the non-military professions inside of Starfleet is not as great as in the real world. In a United Federation that is led by high ideals, it comes down to a simple acceptance of all these things for those that choose to go into Starfleet. So basically I think that if we assume that disease, poverty, and domestic strife have all gone away, it isn't that much of a leap to assume that the Starfleet is overwhelmingly in support of whatever mission it is required to do.