For the stable fraction of the rural popular classes, the dual social and spatial distance of higher education leads to the reproduction of inequalities from one generation to the next. The purpose of this article is to understand the mechanisms that allow these distances to be breached, based on an exemplary case study that reveals the social dynamics identified among four families in the west of France, through a qualitative survey, using an intergenerational and genealogical analysis. The family mission of social mobility through education, made possible by the democratization of public education, is transmitted over three generations and is accomplished by one of the descendants. Through the case study of Margot, this article examines the objective and subjective conditions of her achievement.