The tech pioneers were right: all this connectivity and sharing is creating a new age of freedom and democracy. A global consciousness.

Arab Spring, Barack Obama – both fuelled by social media - make the possibilities feel limitless.

But, just as the dream to connect everyone is being realised - at the height of technological optimism - everything starts to fall apart.

Producer: Caitlin Smith

Archive: C-NET Jan 2007; The Obama White House Archive, April 2011; C-Span, December 2008; C-Span 1996.

New episodes released on Mondays. If you’re in the UK, listen to the latest episodes of The Gatekeepers, first on BBC Sounds: bbc.in/3Ui661u