This post contains mild spoilers for "Avatar: The Way of Water."
James Cameron's "Avatar" is many things — a movie with thrilling action set pieces, a vast world rich in mythology and detail, with some of the most incredible visuals ever put on film — but the film is also a giant, expensive, exhilarating excuse Cameron uses as an avenue to explore his passions as an environmentalist.
We've all heard and talked ad nauseam about how the first "Avatar" has a derivative plot and is...