The title makes it clear that this is a zero-sum game. We have only one planet, and if the apes are taking over, it stands to reason to humanity is rapidly losing ground. In short, Rise of the Planet of the Apes depicts an apocalyptic event. It should be depressing (think every post-nuclear movie ever), yet it isn't because human beings aren't the true protagonists here. Rise is ultimately about the apes, and as such, it's darkly triumphant, a feel-good twist on a familiar post-apocalyptic story. Rise might not be a great movie, but it's a hell of a lot more fun than I expected.