When the United States is able to know everything that everyone is doing, saying, thinking, and planning—its own citizens, foreign populations, international corporations, other government leaders—its power over those factions is maximized. That’s doubly true if the government operates at ever greater levels of secrecy. The secrecy creates a one-way mirror: the US government sees what everyone else in the world does, including its own population, while no one sees its own actions. It is the ultimate imbalance, permitting the most dangerous of all human conditions: the exercise of limitless power with no transparency or accountability. Glenn Greenwald,