“Within the next few years an important threshold will be crossed: For the first time ever, it will become technologically and financially feasible for authoritarian governments to record nearly everything that is said or done within their borders—every phone conversation, electronic message, social media interaction, the movements of nearly every person and vehicle, and video from every street corner.

Plummeting digital storage costs will soon make it possible for authoritarian regimes to not only monitor known dissidents, but to also store the complete set of digital data associated with everyone within their borders. These enormous databases of captured information will create what amounts to a surveillance time machine, enabling state security services to retroactively eavesdrop on people in the months and years before they were designated as surveillance targets. This will fundamentally change the dynamics of dissent, insurgency and revolution.