All eyes on Big Brother: the NSA is building an apparatus that can watch anybody who communicates digitally. Photograph: Pawel Kopczynski/Reuters

In the late 18th century the English philosopher Jeremy Bentham conceived of a prison from which the watchman could secretly monitor the inmates. It w(...)

Supporters gather at a rally in Manhattan's Union Square in support of whistleblower Edward Snowden. Photograph: Mario Tama/Getty

The revelations over the past week about the scale of NSA surveillance of global digital communications is likely to be seen as a pivotal moment in th(...)