Book excerpt: Now in paperback for the first time, Social Movements and their Technologies explores the interplay between social movements and their 'liberated technologies'. It analyzes the rise of low-power radio stations and radical internet projects ('emancipatory communication practices') as a political subject, focusing on the sociological and cultural processes at play. It provides an overview of the relationship between social movements and technology, and investigates what is behind the communication infrastructure that made possible the main protest events of the past fifteen years. In doing so, Stefania Milan illustrates how contemporary social movements organize in order to create autonomous alternatives to communication systems and networks, and how they contribute to change the way people communicate in daily life, as well as try to change communication policy from the grassroots. She situates these efforts in a historical context in order to show the origins of contemporary communication activism, and its linkages to media reform campaigns and policy advocacy.