Abstract
This thesis studies the strategic divergences that go through postcolonial mobilizations against racism. From a sociology of collective action perspective, it studies the use of colonial and racial references as a means of mobilization in the fight against racism in France. By comparing the discourses and repertoires of collective action deployed by three groups active from 1995 to 2022, this work, based on field observation and biographical interviews, questions the foundations of the polarization of postcolonial anti-racism around two models-types of intervention: theory and field. From the notion of space, we see that the orientation towards a postcolonial reading of the world has an impact on the choice of modes of action and, by extension, on the constitution of the activist workforce. This internal dynamic is reflected in an evolution of the links between the anti-racist space and the political field and gives rise to attempts to overcome the borders that separate them. Putting these mobilization strategies into perspective with the social trajectories and militant careers of the actors reveals the importance of class differences in the attempts to mobilize the victims of racism.