Nizan and Guterman were members of the marxist ‘Philosophie’ group that he formed, and Guterman a long-term collaborator despite basing himself across the Atlantic for his last 40 years. Debord and Lefebvre were both concerned with the politics of space, and were close friends as well as colleagues for a number of years. Lefebvre complained about his fellow-communist Aragon’s lack of support, supervised Baudrillard’s doctorate, and gave the young unknown Perec house-room to write.