No matter where you are, there's no getting around issues of society and class. In Dunbar's "We Wear the Mask," society looks mighty cold and even a little dumb, when it comes to the realities the speaker refers to. And since the speaker is talking to a pretty big audience, we get the sense that he's not limiting this poem to any one society or class. Everyone gets served up a nice dish of poetic criticism. Yum.
Dunbar's mask is not so much a question of race, but is rather more about the issues of how society is organized according to race. That's a pretty complex mask there. Spooky, too.
Nope. Wrong. Thanks for playing. Society and class have nothing to do with it; after all, Dunbar's speaker could always remove that "mask" by speaking honestly about the problems he sees around him.