John Perry Barlow, "visionary" internet pioneer, press freedom advocate and Grateful Dead lyricist, has died aged 70, the Guardian reports.
Barlow was named as a Guardian "Open 20" fighter for internet freedom in 2012 because of his work to establish the Electronic Frontier Foundation (EFF), which defends online liberties.
The organisation announced Barlow, a Wyoming native, died in his sleep on Wednesday morning.