This section contains texts edited for the publication Seismography of struggles (INHA/Nouvelles éditions Place, 2020). They present the portraits of personalities who stand out for the importance that journals took as a medium in their personal and collective projects. Shared between artistic, editorial and activist vocations, their works are at the origin of transnational cultural and political networks. Thus, theses personalities are privileged examples in the broader ambition of constructing a global history of critical and cultural journals.