By the way, some people also criticized that the movie was based off a story by two Russians. The story had the same planet, not same name, but same ideas and landscape, and there were the aliens with tails too, just different named. However, that story also had different tribes, and there was not much warring going on.
Ripoff? The two authors said no, its not one. Also, whoever made the movie (I forgot), also said that he didn't steal it from the book, but what does his words mean when he made the movie?
Discus.