The Listeners: A History of Wiretapping in the United States

They’ve been listening for longer than you think. A new history reveals how—and why.

Wiretapping is nearly as old as electronic communications. Telegraph operators intercepted enemy messages during the Civil War. Law enforcement agencies were listening to private telephone calls as early as 1895. Communications firms have assisted government eavesdropping programs since the early twentieth century—and they have spied on their own customers too. Such breaches of privacy once provoked outrage,...