With the death of Joseph Stalin and the 20th Party Congress in 1956, restrictions on sociological research were somewhat eased; the formation of the Soviet Sociological Association was allowed in 1957; and finally, after the 23rd Party Congress in 1966, sociology in the Soviet Union was again officially recognized as an acceptable branch of science. 1962 saw the establishment of the first Russian English-language journal in the field, "Soviet Sociology". In 1968 an Institute for Concrete Social Research (later renamed the Institute of Sociology) was created at the Soviet Academy of Sciences where Yuri Levada, founder of the Levada Center, attracted a small group of followers.