While de-Stalinization had been quietly underway ever since Stalin's death, the watershed event was Khrushchev's speech entitled "On the Cult of Personality and Its Consequences", concerning Stalin. On 25 February 1956, he spoke to a closed session of the 20th Party Congress of the Communist Party of the Soviet Union, delivering an address laying out some of Stalin's crimes and the "conditions of insecurity, fear, and even desperation" created by Stalin. Khrushchev shocked his listeners by denouncing Stalin's dictatorial rule and his cult of personality as inconsistent with communist and Party ideology. Among other points, he condemned the treatment of the Old Bolsheviks, people who had supported communism before the revolution, many of whom Stalin had executed as traitors. Khrushchev also attacked the crimes committed by associates of Beria.