Avatar is not just a modern Sci-Fi epic movie for entertainment but also a movie with message. Here you can see the greediness of man in power who is leading the military forces. A man who is willing to kill anyone on his way to get a precious stone. This also teaches us to respect others and to respect others needs and rights. It teaches us to save the nature from exploitation and shows what will happen if we continue to burn and cut the trees that serve as home to other creatures.
I highly recommend this movie. Excellent both in content and technical special effects.