Lefebvre was a close friend and colleague for several years, and helped inspire Debord’s situationist thought. Bernstein was married to him (they divorced.) Jorn and Vaneigem were co-founders with Debord of the Situationist International. Debord and Isou worked together until Isou split to form the Lettrist International. Debord wrote “almost amicably” to Trocchi to ‘resign’ him from S.I., but then apologised saying he was not in a position to do so. He sent Hausmann copies of a situationist journal, acknowledging Situationism’s debt to Dada.