Science must be open and accessible, and diffusion of knowledge should not be limited by patents and copyrights. After the Open Science Summit held in Berkeley, some notes about sharing scientific data and updating the social contract for science. Against the determinist view on technological and legal solutions, we need an explicit reflection on the relation between science and society. Both academic and industrial science seem unable to fulfill open science needs: new societal configurations are emerging and we should keep asking questions about appropriation, power, privatisation and