The Fog of War is a great documentary about McNamara. The whole thing is on Youtube, and it's extremely interesting.
Part 1:
McNamara's 11 lessons from the film:
- Empathize with your enemy
- Rationality will not save us
- There's something beyond one's self
- Maximize efficiency
- Proportionality should be a guideline in war
- Get the data
- Belief and seeing are often both wrong
- Be prepared to reexamine your reasoning
- In order to do good, you may have to engage in evil
- Never say never
- You can't change human nature