Roddenberry mentioned many times that a large part of Trek's appeal is that it shows a very positive vision of humanity's future, which was a very profound message during the tumult of the sixties and seventies and even during the Reagan era with Cold War tensions, environmental and hostage crises at the forefront..
But, again, Star Trek
wasn't really about the society the Enterprise
supposedly came from. We never even saw
future Earth on the original series. And the individual episodes themselves were hardly dramatizations of the enlightened politics and policies back on Earth; nine times out of ten, they were about beaming down to Gamma Hydroxi VI where strange and unearthly encounters awaited . . . including exotic forms of art and entertainment.
was a theatrical production, not a political symposium. Let's not confuse the backdrop with the stories on center stage.