al. "Towards a Heuristic Method: Sartre and Lefebvre" by Michael Kelly in Sartre Studies International, vol. 5, no. 1, 1999, pp. 1–15. Henri Lefebvre on Space Architecture, Urban Research, and the Production of Theory by Lukasz Stanek 1901 births 1991 deaths 20th-century atheists 20th-century French philosophers Anti-consumerists Atheist philosophers Continental philosophers Critics of postmodernism French atheists French Communist Party members French literary critics French male writers French sociologists Marxist humanists Marxist theorists People from Landes (department) Philosophers of technology Social philosophers Theoretical historians University of Paris alumni Academic staff of the University of Paris Academic staff of the University of Strasbourg Urban sociologists Urban theorists