The requirements of the question are:
This is very difficult.
Not every noun in English has a good adjective form.
Some nouns have good adjectives:
economics — economic (or economical)
ecology — ecological
trees — arboreal
cows — bovine
pigs — porcine
freedom — free
democracy — democratic
But many don’t.
civil liberty — civil-libertarian? Liberational? No.
“Success” might not be the best word to describe this
Success is a word that describes both “pass/fail” concepts and a gradient (continuum).
Democracy, civil liberties and related ideas exist on a continuum.
There is no perfect level of civil liberties or 100% democracy.
You have more flexibility if you use words like “improvement” or “increase”.
These might be close:
😐Maybe: The society’s libertarian success
😐Maybe: The society’s democratic success
😐Maybe: The society’s human rights success
But why not:
🙂Better: The society’s level of human rights success
🙂Better: The society’s increasing human rights success
You can also do a compound noun instead of an adjective plus noun, but this can be quite ugly:
😕 Use with caution:
- the society’s civil liberties success;
- the society’s democracy success;
- the society’s ballot access success
This kind of writing feels very technical. English is open to compound nouns but this can sound very strange.
Or just say what you mean:
I’d recommend you give up on”xxx success” and rephrase.
🤩Best: The society’s recent improvement in civil liberties, access to the ballot box, a free press, freedom of worship, and economic opportunity...
Or just as good:
🤩Best: The society’s success at improving human rights and democratic conditions
Bottom line: you may not be able to force the sentence to say “xxx success”, since not every concept can be expressed that way.