Middle earth, and lots of fantasy in general is dominated by race and racism. Everyone's personality and stature is decided by their birth, and the breakdown of

Middle earth, and lots of fantasy in general is dominated by race and racism. Everyone's personality and stature is decided by their birth, and the breakdown of that system should be a plot point in the story to make the last alliance, though even the final fight is going to be super racist with the good races killing all the bad ones. Diverse communities within those races is a jarring juxtaposition - they're both super racist and super not racist at the same time.