Content by or about the Situationist International, an international organisation of social revolutionaries made up of avant-garde (anti-)artists, intellectuals, and political theorists which was prominent in Europe from its formation in 1957 to its dissolution in 1972.
Preliminaries Toward Defining a Unitary Revolutionary Program
This text is described in Internationale Situationniste #5 (p. 11) as "a platform for discussion within the SI, and for its linkup with revolutionary militants of the workers movement."
Translated by Ken Knabb (slightly modified from the version in the Situationist International Anthology).