<P> The space of flows plays a central role in Castells' vision of the network society . It is a network of communications, defined by hubs where these networks crisscross . Élites in cities are not attached to a particular locality but to the space of flows . </P> <P> Castells puts great importance on the networks and argues that the real power is to be found within the networks rather than confined in global cities . This contrasts with other theorists who rank cities hierarchically . </P> <P> Van Dijk has defined the idea "network society" as a form of society increasingly organizing its relationships in media networks gradually replacing or complementing the social networks of face - to - face communication . Personal and social - network communication is supported by digital technology . This means that social and media networks are shaping the prime mode of organization and most important structures of modern society . </P> <P> Van Dijk's The Network Society describes what the network society is and what it might be like in the future . The first conclusion of this book is that modern society is in a process of becoming a network society . This means that on the internet interpersonal, organizational, and mass communication come together . People become linked to one another and have access to information and communication with one another constantly . Using the internet brings the "whole world" into homes and work places . Also, when media like the internet becomes even more advanced it will gradually appear as "normal media" in the first decade of the 21st century as it becomes used by larger sections of the population and by vested interests in the economy, politics and culture . It asserts that paper means of communication will become out of date, with newspapers and letters becoming ancient forms for spreading information . </P>

Who defined society as network of social relationship