Analysts and policy makers have imperfectly understood the links between migration and its impacts on, and potential for, development. Research is now increasingly exploring this relationship, recognizing migrant contributions in countries of origin, transit and destination. There is a growing understanding of transnational practices linking migrants to both receiving and sending societies. This has led to a broader understanding of the potential for migration to positively impact social and economic development both at home and abroad. Migrants often support their families and communities in countries of origin through remittances. Money, goods, and social capital sent home often contribute to the economic and social development of communities and countries. Migrants also play an integral part of the development of host countries by supplementing gaps in labour markets, transfers of skills and contributions to cultural enrichment. Increasingly, governments in the Global South are turning to their own extra-national diasporic populations in order to boost economic development, build global trade and investment networks, while increasing their political leverage overseas; but this is not without consequences. Our research assesses the various angles and influences of migration on development. We focus on enhancing an international understanding of the potential of migrants at all stages of their journeys, including the implications of remittances, diasporas and development, social and economic costs and benefits and the power dynamics and interests at play.