sions and tactics and their developments both synchronically and diachronically. At the individual level, it accounts for the activists' careers and exit/entry phenomena. Three militants' careers, typical of each of the three generations, are detailed in order to grasp the relations of the reasons and causes of flows. These provide an illustration of the differentiation of two types of fields over the last 20 years, the partisan field on which most social movements depended since at least the end of World War II, and the militant field, of which Droit au logement seems to be typical.L'association Droit au logement (DAL), créée en 1990, a largement contribué à l'évolution des répertoires d'action collective durant les dix dernières années e...