Robert Leroux is a professor of sociology at the University of Ottawa. 

Jean-Christophe Marcel is a professor of sociology at the University of Burgundy.

Introduction; Chapter 1. A Theorist of Collective Memory, Éric Brian; Chapter 2. Halbwachs and the Durkheimian Perspective on History, Robert Leroux; Chapter 3. Maurice Halbwachs, Sociologist of Memory: His Reception in Italy and the Development of the Sociology of Memory, Teresa Grande; Chapter 4. Population as the Body of Society, Jean-Christophe Marcel; Chapter 5. Urban Morphology and Social Morphology: Marcel Roncayolo and the Work of Maurice Halbwachs, Gilles Montigny; Chapter 6. Halbwachs's Leibniz and Halbwachs's Sociology, Guillaume Coqui; Chapter 7. Halbwachs on Quetelet and the Use of Statistics in Sociology, Christian Robitaille; Chapter 8. Maurice Halbwachs and the Sociology of Consumption and Social Classes, Lorenzo Migliorati; Chapter 9. From Criticism of Moral to the Probalistic Test, Éric Brian; Chapter 10. The Age Criterion: Between Sociology and Biology, Marie Jaisson; Chapter 11. Speculation: Order or Disorder?, Jacques Lautman; List of Contributors; Index.