This thesis shows how the imaginaries in films concerning the threat inherent to nature, technology or social issues emphasizes the mental climate developing nowadays. The emergence of a postmodern hero seems to indicate a deep change in the social sphere. This research uses different sociological analysis of film-making, the analysis of the contentof a corpus of thirty films directed during the first decade of the twentyfirst century, youth answers to opinion polls and texts from contemporary world observers. In so doing it reveals the interactions linking cinema and reality. These films constitute a ground of observation of the nowadays obsessions.
