Gay marriage: Can online activism make a difference?

The gay rights advocacy group Human Rights Campaign (HRC) has launched an effort on Facebook to sway public opinion on same-sex marriage. Can social media activism be quantified and transformed into a significant force in American politics? Millions of Facebook and Twitter users across the globe changed their user profile pictures last week to a version of the HRC equals sign logo, showing their support for same-sex marriage as the issue was being weighed by the US Supreme Court.But some question whether viral campaigns on social media will ultimately have any impact in Washington DC.

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