Amid the “global turn” in historiography, the literature on migration has undergone a considerable transformation. Óscar Handlin’s more traditional paradigm, which understood migration as an uprooting, has been gradually abandoned since the 1970s and 1980s; new research has emphasised mechanisms of migratory mobility—family and social networks that intervene in migration—and with them, the imperceptible but affective links that continued to bind mobile men and women to their places of origin and to their kin. In the 1990s, the notion of diaspora drew attention to relationships with relatives and countrymen who were dispersed across broad geographies. Migration studies have more recently developed longitudinal analyses or prosopographic approaches to these collectives, accounting for individual mobility trajectories and providing a more intelligible vision of possible routes, their global interconnections, and their effects on individual and collective experiences. Technological advances permit us to envisage a future in which this type of research—requiring the cross-referencing of records held in different national archives—will be more widely practised. Such advances also open the door to new inquiries into the political and legal effects of migrants’ circulation. In the case of Argentina, I refer in particular to families who continued their trajectory of mobility after their children were born in the country, whether with the aim of returning to their country or region of origin, or labour migration in other latitudes; their experiences attest to the global dimension of nationality as a legal status of the individual.