This article presents an outline of Régis Debray's mediology. Situated at the crossroads of philosophy, theology, anthropology, archaeology, history, sociology, political sciences, semiotics, media and cultural studies, mediology is a relatively autonomous discipline that analyses the totality of the processes of mediation that intervene between culture and agency, and transform ideas into a material force. Mediology or mediation studies broadens the notion of media so as to include all material and institutional vectors of communication and defines mediation as the totality (...) of interactions between culture and technology that make the diffusion (through space) and the transmission (over time) of ideas possible. (shrink)