Communication Aesthetics is both a theory and an art tendency, devised in 1983 by the Italian philosopher Mario Costa and the French artist Fred Forest at Mercato San Severino, Italy, and set out in a manifesto signed with Horacio Zabala. It calls for art that works through late twentieth-century communications technology - video, telex, satellites, computer networks - on the observation that networks increasingly shape perception, space and social life. The artist becomes a "social operative", replacing the production of art objects with staged interactions among participants; artworks are events such as live telecasts and networked cafés. An informal international group formed around the idea, including Roy Ascott, Antoni Muntadas and Derrick de Kerckhove, and its examples run from Hole in Space to Ascott's distributed-authorship project La plissure du texte.