Oil. Extremists. An affluent nation thinking it knows better than the 'savage' one.

Gene Luen Yang is not backing off from 'adult' topics in a comic that has children as their main audience. I am glad that he does because for children growing up in this world this particular trilogy shows that the world - whether it is ours or the Avatar world - is not black and white. And I think it is important to acknowledge that. It also shows that a small group of extremists does not represent a whole nation. It shows that some beliefs are grounded in reasonable standpoints but when taken to the extreme... it goes completely off the track.
However, sometimes the art threw me off and scenes were quickly changing, which confused me. Still, I am very glad about this more grown-up turn of the story because it makes it more enjoyable for me, too.