In response to the multiple global crises and current challenges facing European societies, new practices of solidarity and citizenship have emerged at the local scale, deeply rooted in experiences of social struggle. Arguing that research addressing the local scale and its multiscalar entanglements can be useful in addressing the pressing challenges of our time, this book analyses how social movement organizations and civil society initiatives across ten European cities (in Denmark, Germany, Italy, Slovenia, and Switzerland) reimagine and transform solidarities in three contentious social fields that have been particularly impacted by these crises: migrant rights, housing, and care. The debate in this book is focused on contemporary movements’ framing of social issues in the context of multiple, intersecting crises, thus intervening in the fields of social movement studies, urban studies, political communication, and frame analysis, as well as broader theoretical and public debates on concepts of solidarity and citizenship. Featuring an international group of scholars working on social movements, solidarity, and citizenship, this book investigates how dynamics of the polycrisis not only generate new forms of inequality and social exclusion, but also new forms of solidarity, political activism, and citizenship.