Some people are blue-people people and some are not. James Cameron’s ambitious 3-D fantasy Avatar caused a sensation when it was released in 2009. No one had ever seen anything like it, which didn’t make it a great movie, though its novelty did help make it one of the top-grossing movies of all time. Avatar seemed to tap a genuine desire for novelty, and its relatively simple story—of a moon-planet of highly evolved nature-loving beings with azure skin, invaded by greedy colonialist humans—made for an easily recognizable parable of the myriad real-life crimes white people have been perpetuating in our own world for centuries. Whether or not you cared much about the Na’Vi, the blue people of Cameron’s invented moon, Pandora, you could…