This made me think of something in the game...I hope I'll be able to provide the justice you seek. It's definitely my plan to!
But keep in mind, there are more slaves in the world right now than ever in human history. I'm talking about real life.
Does this mean the world is just going along with it? Doesn't seem too unbelievable now, does it =/
Not many people even know that. That there has never been more slaves in the world. And much like the world I've created, not many people are making a fuss about it, are they?
Unless that has changed, not only is this the only nation with slaves, but knowledge of it, and even that elves are real, is very limited in the outside world.
The country Kali's dad runs seems to know about them, but the one that the MC is from was more or less unaware.
Not sure how many other nations there are, but perhaps they could get some other countries involved too, like with other countries putting sanctions on them until they stop the abuses, something like that...