“The devil in the detail is that Smart Crowds are fragile. With a very little adulteration, they cease to be smart at all, and become remarkably stupid, or indeed self-harming. They are susceptible to stampeding by demagogues, poisoning by bad information. They can be made afraid, and when they do they become mobs. They can be divided by scapegoating and prejudice, bought off in fragments, even just romanced by pretty faces.”