In an interview with Time conducted via e-mail in early December, Snowden explained his answers to those big questions, even as he allowed for the fact that the U.S. public he sees himself serving may not ultimately agree. The privacy of regular citizens, he believes, is a universal right, and the dangers of mass surveillance litter the dark corners of the 20th century. “The NSA is surely not the Stasi,” he argued, in reference to the notorious East German security service, “but we should always remember that the danger to societies from security services is not that they will spontaneously decide to embrace mustache twirling and jackboots to bear us bodily into dark places, but that the slowly shifting foundation of policy will make it such that mustaches and jackboots are discovered to prove an operational advantage toward a necessary purpose.”