Situationist International

I recently read a Guy Debord book.

Stumbled upon during a recent Wiki search, from Wikipedia

The Situationist International (SI) was a small group of international political and artistic agitators with roots in Marxism, Lettrism and the early 20th century European artistic and political avant-gardes. Formed in 1957, the SI was active in Europe through the 1960s and aspired to major social and political transformations. In the 1960s it split into a number of different groups, including the Situationist Bauhaus, the Antinational and the Second Situationist International. The first SI disbanded in 1972.