Elisabeth Noelle-Neumann's theory of the spiral of silence is already 40 years old as of 2012. The scientific discourse surrounding what is arguably the most influential theory in communication studies has been ongoing for just as long. In light of the constantly evolving media landscape, this discussion is gaining new momentum: the establishment of the internet and the accompanying abundance of information, newly emerged forms of journalism, and the changing selection and reception behavior of the audience seem to pose significant challenges to the central assumptions of the spiral of silence. This book systematically analyzes the changes in the internet age and puts Noelle-Neumann's theory of public opinion to the test.