Helen Margetts Knihy

As people spend increasing proportions of their daily lives using social media, such as Twitter and Facebook, they are being invited to support myriad political causes by sharing, liking, endorsing, or downloading. Chain reactions caused by these tiny acts of participation form a growing part of collective action today, from neighbourhood campaigns to global political movements. 'Political Turbulence' reveals that, in fact, most attempts at collective action online don't succeed, but some give rise to huge mobilisations - even revolutions