Migration and development are two key phenomena within our globalised world and vast topics of major policy relevance, yet their interactions are rarely synthesised. This book examines the evolution of the complex relationship between migration and development, drawing on the latest empirical research and a broad range of theoretical and conceptual frameworks to answer key questions about the impact of migration on development. It interrogates key questions, including: • How far does migration offer an effective route out of poverty? • Can migration benefit migrants’ countries of origin? • Does migration risk reproducing under-development through the effects of de-population and brain drain?