In France, when we speak of migrant integration—whether it be in political language or in the language of the human sciences—we are most often speaking about insertion or institutional hospitality. In this optic, integration refers to a set of economic, legal, and political procedures for managing immigrant populations in which the national govenment plays the principal role. This kind of integration is rooted in systems: social system, education system, or health care system, for example. However, this form of integration, which we can call top-down integration, is not all there is to integration.