Malcolm Gladwell: “David’s victory over Goliath, in the Biblical account, is held to be an anomaly. It was not. Davids win all the time. The political scientist Ivan ArreguÃn-Toft recently looked at every war fought in the past two hundred years … in which one side was at least ten times as powerful – in terms of armed might and population – as its opponent, and even in those lopsided contests the underdog won almost a third of the time.”