In times of global capitalist crisis we are witnessing a return of critique in the form of a surging interest in critical theories (such as the critical political economy of Karl Marx) and social rebellions as a reaction to the commodification and instrumentalization of everything. On one hand, there are overdrawn claims that social media (Twitter, Facebook, YouTube, etc) have caused uproars in countries like Tunisia and Egypt. On the other hand, the question arises as to what actual role social media play in contemporary capitalism, crisis, rebellions, the strengthening of the commons, and...