Eywa is the Great Goddess and on Pandora she is life. The Na’vi believe that Eywa keeps the ecosystem in perfect equilibrium. That all living things on Pandora are connected
to Eywa making her the Great Goddess. Eywa is connected to everything and that is why at the end of the movie you see the dragon fly in and fight against the human. Eywa to them to fight to protect Pandora, so that it won’t become a wasteland like earth.
Eywa does choose a side in the end, and helps the Avatars defeat the sky people, and take back their land. I do think that by having Eywa defeating the sky people it shows a change in culture. Women have a much larger role in society than they had back in the old days. By having the Great Goddess Eywa defeat men it shows that woman are taking back power in society.