A perfect example of my definition of high art is the Oscar-nominated The Secret of Kells. It uses traditional 2-D techniques and is completely accessible -- what my recent critic might call solidly bourgeois middlebrow.
In Cameron's world, Nature is always wise and noble, which indeed it can be, but he fails to show its brutal side. The only thing that was brutal, crude, and immoral in the movie was the "advanced" technology.
The world will never dispatch a savior to Congo who, like the paraplegic Marine Jake in the James Cameron epic Avatar, will damn self-serving interests and decide to protect a unique world and complicated society.