Basically shared values, behaviours, rough sense of justice, morality and humanity, and a sense that individuals ought to aspire to those on some level.
It's funny because in the West we talk a lot about 'freedom' and 'classical liberalism' - I really think that's partly:
a) A response to historically authoritarian systems either political or cultural which were possibly 'too much'
b) An appeal to the ego: none of us really want to 'follow rules', I mean, we all just want to 'do whatever' - it takes 'second order thinking' to act 'morally' and 'responsibly' in whatever context those are defined ... and we're always going to define them a little bit differently.
I think we all understand this on some level, even if our ideologies are wrapped up in something else.
We tend to build ideals around nitpicking, and when a certain 'orthodox morality' clashes with some other form of 'expression' (say, no common acceptance of trans people), then we get into an existential fight with said 'orthodoxy', The 'sides' become polarized, revolutionary, we look at everything through that narrow lense and end up missing all of the other 'very important things' many of us take for granted ... when probably what needs to happen is just some tweaking.