This book examines the factors affecting the health and wellbeing of young people as they transition to adulthood under the shadow of migration control. Drawing on unique longitudinal data, the book illuminates how they conceptualize wellbeing for themselves and others in contexts of prolonged and politically induced uncertainty. The book offers an in-depth analysis of the experiences of over one hundred unaccompanied young migrants, primarily from Afghanistan, Albania, and Eritrea. It shows the lengths these young people will go to in pursuit of safety, security, and the futures they aspire to. Interdisciplinary in nature, the book champions a new political economy analysis of wellbeing in the context of migration and demonstrates the urgent need for policy reform.