Prezi from a lecture I gave on the social network revolutions in the #mena region, mainly concentrating on case studies of Tunisia, Egypt, Syria and Yemen. I start by drawing a broad conceptual framework around the notions of nodes with power, participatory culture, and the empowerment of peripheries in the context of hierarchical systems of information control. There are many ways to approach the still unfolding events of the #arabspring, but I chose to focus on the way individuals acted as catalysts and leveraged social networks to achieve critical mass both on and offline. In that respect I tried to underscore – in disagreement with the arguments of Evgeny Morozov – that it is crucial not to underestimate the role of social media such as youtube, facebook and twitter in creating scale-free network effects for the protest movements. I also focus on the role of women – Asmaa Mahfouz and Tawakel Karman – in inspiring, organizing and leading the protests in Egypt and Yemen respectively.