This volume addresses processes of human mobility in times of crisis from different scientific perspectives and at a global and trans-regional level. The first part sets out to discuss established paradigms in migration studies and politics in order to suggest new approaches to analyse mobility, migration and boundary making approaches. The second part presents empirical cases from Latin America and Spain to demonstrate how migrants challenge, negotiate and mobilize citizenship and belonging. The third part deals with the question how belonging is produced and identity is constructed at a transnational level. New information and communication technologies, human mobility but also the mobility of concepts, ideas and values foster these collectivization processes across and within physical and symbolic borders.