Glavlit was the Soviet government's censorship agency, established in the 1920s, tasked with overseeing and controlling all forms of written and published material in the USSR. Its primary role was to ensure that all content aligned with the Communist Party's ideology and that any dissent or critical views were suppressed. This agency played a crucial role during Stalin's rise to power and throughout the implementation of the Five-Year Plans, as it controlled public perception and information dissemination.