The MoSAiC project aims to create a European consortium bringing together academic and non-academic partners around the question of the imaginaries, practices and memories of social and political commitment in the contemporary era (19th - 21st century), from the local to the global scale. The European project targeted is the Marie Sklodowska-Curie Staff Exchanges 2023, which will enable the organisation of one-month to one-year mobilities over four years between the various partner institutions. Based on their internationally recognised expertise in the fields of cultural history, the three laboratories behind MoSAiC propose, in a multidisciplinary (history, art history, literature, LLCER, artistic disciplines, etc.) and international approach, to renew the study of the complex process of individual and collective commitment around four axes: from the triple angle of imaginaries, practices and memories; over a long period of time, from the early 19th century to the present day; in a comparative and diachronic perspective. Finally, special attention will be paid to the question of sources, archives and objects available to tell this historical narrative. Thus, through the choice of these perspectives, the MoSAiC project wants to renew the study of social and political commitment in the contemporary era - understood as all actions, individual or collective, within the public space (polis), with a view to influencing public, national or international life. The aim is to encourage an analysis based on thematic entries (such as republican, national and patriotic activism; workers' internationalism; communism; fascism and anti-fascism; the defence of human rights; international solidarity movements; feminism and ecology), crossing the study of imaginaries and practices in order to grasp the representations that both play a role in the process of mobilisation and emanate from the commitment itself. The third dimension, the memory, aims to emphasize the issues of writing the historical narrative of the commitment. Material culture and visual culture in particular will be mobilised here in close dialogue with archivists and museum managers in order to reflect together on the types of sources (written, audiovisual, etc.) and objects to be collected, preserved and developed around the history of commitment in all its facets. Indeed, the originality and innovative character of the MoSAiC project also rests on the choice to develop a programme of mobility between the personnel of research centres, universities on the one hand - and in particular doctoral students - and archive, documentation and exhibition centres on the other. The ambition is to encourage close collaboration between these different institutions, with their respective expertise, in order to jointly reflect on how to better disseminate the results of scientific research to a non-academic public. The mobility programme should also enable a dialogue to be initiated between scientific and artistic approaches and lead to concrete results in various formats: publications, exhibitions (virtual or otherwise), web-documentaries, etc. Taking up the theme of social and political commitment in order to contribute to the democratisation and popularisation of knowledge on a European scale seems to us to be particularly relevant in view of the numerous challenges currently facing democracies in Europe.