Introduction. Social Media and Civic Engagement / Online Activism, CSR and Institutional Change / Why Some Political Opportunities Succeed and Others Fail: Bridging Organizational Levels in the Case of Spanish Occupy / Responsible Retailing and the Greek Crisis? Corporate Engagement, CSR Communication and Social Media / Technologies of Self-Mediation: Affordances and Constraints of Social Media for Protest Movements / When Narratives Travel: The Occupy Movement in Latvia and Sweden / Corporate Management of Visibility: Social Media and Surveillance / From Creation to Amplification: Occupy Wall Street's Transition into an Online Populist Movement / Nurturing Dissent? Community Printshops in 1970s London