The MOBILISE project asks: When there is discontent, why do some people protest while others cross borders? Connecting theoretical expectations from the migration and protest literatures, we examine: a) whether similar factors drive the choice to migrate and/or protest at the individual level; b) how context affects this mobilisation; c) whether these choices are independent of each other or mutually reinforcing/ undermining. MOBILISE employs a multi-method (nationally representative face-to-face panel surveys, online migrant surveys, protest participant surveys, focus groups, life-history interviews, social media analysis) and a multi-sited research design. It covers Ukraine, Poland, Morocco and Brazil, which have recently witnessed large-scale emigration and protests. It follows migrants from these countries to Germany, the UK and Spain. The project offers four key innovations: 1)it combines protest and migration; 2)it captures all the relevant groups for a comparative study (protesters, migrants, migrant protesters and people who have not engaged in migration or protest); 3)it tracks individuals over time by employing a panel survey; 4)it includes the use of social media data providing real time information on the role of networks and political remittances. These features allow the project to make a major contribution to theory development in both migration and protest studies and offer key insights to policy makers on factors influencing political and economic stability.