So how is your fictional world set up? Why has it been set up that way? Does it treat all people decently (or at least try to do so and be seen to try to do so)? When injustices happen, what is the result of these? Are the injustices corrected or are they made worse by being allowed to stand? Who fights injustices? How did the injustices happen? Could they have been stopped?
Over time has your fictional world improved the way it treats its residents? Or does that world never change and those who try to seek change are punished for it? I like to see characters develop but I also like to see the world in which they live develop too. I think it would be difficult for any society to stay totally static (technology for example is bound to have an impact and would improvements in medicine really be ignored by a society that has decided it doesn't want to change? Wouldn't it use what it likes and ignore what it doesn't?).