Washington in 1965. We instinctively measure advantage in terms of the three M’s because men, money, and matériel are the easiest and most obvious ways to make sense of a battle. The only way to appreciate the threat that the Viet Cong posed was to actually listen to what they had to say—to look past the armor and see the man. The book you have just read has tried to persuade you to think that way. Men, money, and matériel aren’t always the deciding factors in a battle. In fact, what the inverted U-shaped curve tells us is that having too much money and matériel is as debilitating as having too little. Being an underdog—having nothing to lose—opens up possibilities. The Impressionists were better for shunning the Salon. History and experience ought to teach us to be suspicious of Goliaths, because the very thing that makes the giant so terrifying is also the source of his weakness. David understood that, as he sized up his opponent long ago in the Valley of Elah.