Denunciation became so commonplace under Stalin that people regarded it as their patriotic duty to spy on others and even expose members of their own family. The original Bolsheviks, for reasons of ideological purity, put great store in transparency. But under Stalin, transparency evolved into a state of constant surveillance.
In the late 1930s, a young man named Sasha Parsky kills two soldiers who come to arrest his parents as kulaks. He...