Five years after its acceptance by the 2005 World Summit, it is time to consider the contribution that the Responsibility to Protect (R2P) has made and could make to the prevention of mass atrocities. While there is considerable general support for R2P along the three pillars suggested by the UN secretary general, fundamental questions remain. Julia Hoffmann ran this blog for The Broker from the 'Responsibility to Protect' conference in Sweden from 8–12 June 2010. Julia is a lecturer at the Department of Communication Science at the University of Amsterdam. Her research interests focus on the intersection of international law and communication.