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Social Media for Social Good: What role does social media play in creation of and sustainability of social movements? A Social Movement Case Study Examining Occupy Wall Street and the Tea Party.

Public Policy Blog

He specifically distinguishes social movements from political parties and advocacy groups. Sidney Tarrow defines a social movement as collective challenges [to elites, authorities, other groups or cultural codes] by people with common purposes and solidarity in sustained interactions with elites, opponents and authorities (1998).