WikiLeaks affects one of the key tensions in democracies: the government needs to be able to keep secrets, but citizens need to know what is being done in our name. These requirements are fundamental and incompatible; like the trade-offs between privacy and security, or liberty and equality, different countries in different eras find different ways to negotiate those competing needs.
[…] In 2006, WikiLeaks launched, holding out the possibility of evening up the odds, however slightly, in favour of the citizens. For the first three years of its existence, this change was more potential than actual, but in 2010, with the release of the Collateral Murder video, the Afghan war logs, and, most significantly, the US embassy cables, increased oversight of the state by citizens became real.
http://www.guardian.co.uk/commentisfree/2011/feb/04/wikileaks-created-new-media-landscape