This book reviews research on the topic of mindsets among families in various cultures, as well as the role of the "border worker". Migration processes, family reunifications, mixed couples, pathologies of transition, syndromes caused by uprooting are daily issues in our outpatient clinics, hospitals and services. The psychologist, the psychotherapist, the social worker, and the nurse each takes on a new role of "border worker", which is specified by pre-defined methodological and professional grids and yet is also shaped by the multiple realities and different levels that it requires to make contact with. There is a need for renewed ways of thinking and intervening which are more flexible, open and "nomadic".