This first publication of the annual Mixed Migration Review by the Mixed Migration Centre offers a review of mixed migration around the world focusing on key events and policy developments during the 2017/2018 period. The report includes a series of essays looking at the most salient and polemical issues facing the refugee and migration sectors with respect to mixed flows, as well as a series of interviews with individuals and officials closely associated with or relevant to the sector and its challenges. The report is based on a wide range of research as well as exclusive access to 4Mi data from over 10,000 interviews with refugees and migrants in over twenty countries along seven major migratory routes. In three major sections (the migrants’ world, the smugglers’ world and global debates), the report offers a deep analytical dive into the world of mixed migration. The report does not offer one-size-fits-all solutions or simple conclusions, but raises many difficult questions and treats the mixed migration phenomenon with the complexity it deserves.