When we think of David and Goliath, we think of a small man who takes on a huge, terrifying opponent and wins. We think of David as someone who has defied the odds. The story, as Gladwell says, is “a metaphor for improbable victory”. But this sort of thinking is all wrong, he says. David was a “slinger” — an expert marksman. Goliath was heavy and unwieldy. So David had better odds than we’d think. This is a handbook for underdogs. Who hasn’t, at some point in their lives, felt like the David of legend, facing up to a big, scary opponent? Gladwell makes us see that when we feel weak, we might be stronger than we think.