A mid 20th-cent. organization of radical artists and intellectuals, which brought together ideas from avant-garde art and Marxist theory to form a critique of contemporary capitalist culture; abbreviated SI.
The organization was active in Europe from 1957 to 1972, and was influential in the civil unrest in France in May 1968. Its founding manifesto, written by G. Debord (1931–94), proposed the construction of ‘situations’ or ‘momentary ambiences of life’ as an alternative to what it saw as the ‘spectacle’ of modern society.
1950s; earliest use found in Architectural Review.