Before revision: A 2004 poster announcing a large-scale dérive in London, led by a psychogeographical society The dérive (, "drift") is a revolutionary strategy originally put forward in the "Theory of the Dérive" (1956) by Guy Debord, a member at the time of the Letterist International.
After revision: A 2004 poster announcing a large-scale dérive in London, led by a psychogeographical society The dérive (, "drift") is an unplanned journey through a landscape, usually urban, in which participants drop their everyday relations and "let themselves be drawn by the attractions of the terrain and the encounters they find there", as a concept originally put forward in the "Theory of the Dérive" (1956) by Guy Debord, a member at the time of the Letterist International.