Sophie Lacher, Matthias Rohs

• Amid escalating climate change and delayed political measures to prevent them, questions of how individuals negotiate the tension between collective climate protection and personal disaster preparedness have become increasingly urgent. This study explores these dynamics by examining the biography of ‘Lukas Sandner’, a sustainability activist whose trajectory reflects a shift from collective climate action to personal adaptation. Using a reconstructive biographical analysis based on a biographical narrative interview and the documentary method, the study reconstructs the interpretive frameworks and orientations that shape his actions and that situate him within this tension. The analysis shows that transformative learning was triggered by a disorienting event—particularly a severe heavy rainfall event—which redirected his focus from collective prevention efforts towards individual preparedness. His strategies include stockpiling, technical measures, and gardening understood as a hybrid practice linking ecological ideals with precautionary foresight. These shifts are dialectical, shaped by earlier experiences of concealment and reframing. The findings illustrate how personal trajectories intersect with broader social dynamics, showing how biographical experiences, structural conditions, and collective discourses converge to shape preparedness, highlighting the interplay between collective responsibility and private resilience. The reconstruction of Sandner’s biography may provide clues to underlying societal trends toward individualised adaptation and risk prevention strategies in industrialised societies in response to growing disillusionment about the possibility of preventing climate change.