Why did crime in New York drop so suddenly in the mid-90s? How does an unknown novelist end up a bestselling author? Why is teenage smoking out of control, when everyone knows smoking kills? What makes TV shows like Sesame Street so good at teaching kids how to read? Why did Paul Revere succeed with his famous warning? In this brilliant and groundbreaking book, New Yorker writer Malcolm Gladwell looks at why major changes in our society so often happen suddenly and unexpectedly. Ideas, behavior, messages, and products, he argues, often spread like outbreaks of infectious disease. Just as a single sick person can start an epidemic of the flu, so too can a few fare-beaters and graffiti artists fuel a subway crime wave, or a satisfied customer fill the empty tables of a new restaurant. These are social epidemics, and the moment when they take off, when they reach their critical mass, is the "Tipping point"