Born 1913 in Zagreb. Died 1993 in Zagreb. Studied philosophy at the University of Zagreb (grad. 1937) and psychology at the University of Paris (Ph.D. 1952). 1963 professor of sociology at the University of Zagreb in the Institute of Sociology that he had founded. Founder of the Korčula Summer School. 1952–1954 editor-in-chief of the journal Pogledi, 1967–1973 editor of the magazine Praxis (founded in 1964).
- R. S., Egzistencijalizam i dekadencija, Zagreb, 1950.
- R. S., Umjetnost i psihologija, Zagreb, 1958.