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The Fog of War : Eleven Lessons From the Life of Robert S McNamara (Morris, 2003) - Riveting, thought provoking, and horrifying. Incredible documentary about people. war, politics, and base human natture. A vision of the last century through the eyes of a man who was there, right in the middle of the centuries greatest (read:worst) conflicts. His conclusions on the matter are completely engrossing, and So important to consider, for everyone alive today.
The cool thing about mr. McNarmara, is that he doesn;t pander or make excuses for his sometimes questionable actions. He simply studies the actions, and asks the question, why? He examines the warlike nature of people, and how conflict has always interested us.