This book offers a comprehensive and accessible overview of international labour migration and the ILO's efforts to protect migrant workers through a rights-based approach. It gives new insights into the factors that motivate people to seek work outside their country of origin and the significant development effects on both origin and destination countries. Exposing the often limited access of migrant workers to their fundamental rights at work, it describes in detail the international norms that have evolved to protect migrant workers and ensure decent work for all. It reflects on existing an