Violence begets violence. We’ve all become accustomed to television images of US police responding to even the most apparently minor civil disturbance with guns drawn and pointed, barking orders at suspects and bystanders alike, taking no prisoners and no chances whatsoever, because somebody, anybody, could suddenly turn violent and put them in a life-threatening situation. And it’s true, they could. But what came first, the chicken or the egg? Is America an armed society because everyone is armed to the back teeth, or is everyone in America armed to the back teeth because they live in an armed society? Do American police adopt their ‘shoot on sight’ approach because every suspect is lethally dangerous, or is the lethal danger at least in part a product of police willingness to ‘shoot on sight’?