The political mobilisation of diasporas is an increasingly important part of the social science research agenda. The study of how cycles of mobilisation shape diaspora-making processes and affect diasporic relations with host and home countries is crucial to every specific case. Understanding diasporas simply as products of migration and ethnic/national groups abroad has long been criticised for having a static and essentialist undertone. With this criticism in mind, a new project, DIAMOND, uses elements of social movement studies to develop a comparative research of mobilisation processes among Belarusian and Ukrainian populations in Poland. This issue of Spotlight is dedicated to explaining how this project addresses those complex issues.