Why Privacy Matters

A much-needed corrective on what privacy is, why it matters, and how we can protect in an age when so many believe that the concept is dead.

Everywhere we look, companies and governments are spying on us—seeking information about us and everyone we know. Ad networks monitor our web-surfing to send us "more relevant" ads. The NSA screens our communications for signs of radicalism. Schools track students' emails to stop school shootings. Cameras guard every street corner and traffic light, and...