A traitor? I don't think so. This real story describes how did Daniel Ellsberg try to stop Vietnam War. He was one of them who thought the victory belongs to USA. But when he was being a inspector in Vietnam, he started to doubt himself. The papers for evaluating the situation of the war for Vietnam from Rand Corporation is totally changed him. I don't know anything about Vietnam War before seeing this movie. And this movie makes me to recall another movie, Fahrenheit 911. Both movies are different in style. One is telling the truth in back, the other one may be a truth, too. One is using serious way, the other one using a humorous way(but we should take it seriously, war is not a funny thing). I think anything has connection with politics, that will be the most terrible thing. Because everybody has a dark side. No one is totally bright!(That is that guy's dark side is having huge bright proportion.) I don't think Daniel Ellsberg is a traitor. If he is, he betrayed to the law which protect people who make wrong decision and don't want to take responsibility.