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Yeah, there’s a singular implied “universal morality” throughout Star Trek of accepting diversity and learning to not impose on other civilizations or each other on the basis of one’s biological differences or culture, even for Klingons! I’d say the rest is hard to define and subjective, as @[email protected] said above, but post-scarcity and free agency in life to follow your passions has to be pretty close!
This is why I love TNG so much. Even though TOS is the original that laid the groundwork for everything, TNG took that “boundless optimism” and ran with it. Watching TNG inspires me to continue to self-improve and encourage it in others.