I mean I can really only imagine two broad categories for “solutions”

1) Someone demonstrates a bigger stick. At this point a bigger stick is effective counter-nukes, or perhaps the presence of an alien civilization.

2) What you call unipolarity, although I think both are unipolarity. Mass behavioral transcendence towards a higher form of morality. Maybe achieved via BCI, or improving standard of living, or subtle coercions by AI, or looming threat of climate change prompting transformative cooperative efforts.

The latter was omitted for brevity, due to its unlikelihood. Of course it’s not binary, there’s a bit of each in the other.

Yeah that's a grim way to look at the world. And there are many who are engaging in that mindset.

There will come a time when taking from others because of the unwillingness to be a creative member of society is seen as a curable mental illness.

Yes, at about the same time the society will have finished taking all of agency from it's individual members, forming beautiful eusocial hivemind.