Abstract:This article uses interviews with committed anti-war and peace activists to offer an overview of both the benefits and challenges that social movements derive from new communication technologies. It shows contemporary political activism to be intensely informational; dependent on the sensitive adoption of a wide range of communication technologies. A hyperlink analysis is then employed to map the UK anti-war movement as it appears online. Through comparing these two sets of data it becomes possible to contrast the online practices of the UK anti-war movement with its offline ‘reality’. When encountered away from the Web recent anti-war contention is grounded in national-level political realities and internally divided by its political diversity but to the extent that experience of the movement is mediated online, it routinely transcends national and political boundaries.