Grateful Dead lyricist John Perry Barlow, who was also an internet activism pioneer, has died at the age of 70.
Barlow was the writer behind several Grateful Dead classics including "I Need a Miracle" and "Cassidy" -- writing many of them alongside band member Bob Weir. Weir mourned Barlow on social media after news of his death surfaced.
"This life is fleeting, as we all know - the Muse we serve is not. John had a way of taking life’s most difficult things and framing them as challenges, therefore adventures. He was to be admired for that, even emulated. He’ll live on in the songs we wrote," Weir tweeted, HuffPost reported.
Other tributes soon poured in, with many expressing sadness over Barlow's passing.
"The world lost a true hero today, a Renaissance man who was a relentless warrior for our freedom. We will all miss you," entrepreneur Nolan Kay Bushnell tweeted.
Barlow was also an activist for online freedom, and co-founded the Electronic Frontier Foundation. Cindy Cohn, an executive with the organization, mourned Barlow in a statement.
"It is no exaggeration to say that major parts of the Internet we all know and love today exist and thrive because of Barlow’s vision and leadership. He always saw the Internet as a fundamental place of freedom, where voices long silenced can find an audience and people can connect with others regardless of physical distance," Cohn's statement read.
Other tributes praised Barlow following his tragic death.
"I knew John Perry Barlow from the early days of Twitter, when the place was like a global coffee shop we all staggered into in the mornings. He was never less than kind, funny and warmly human. Good night, John," author Warren Ellis tweeted.
"Oh, no. I just knew something awful would happen to my generation today! And only 70! These days, especially here in Florida, where we dress young, act young, attend marches and political meetings, fight to save our lagoon. 70 is really young to die. What a loss to rock 'n roll," one HuffPost reader commented on the site's Facebook page.
"I am so very sorry...his words have transformed, comforted and pleased so many...this Deadhead is forever Grateful...May you Rest In Peace...and jam with Jerry, Brent and Pig Pen," another added.
"Today the world lost a champion of the internet. I lost an old friend. Memories are rushing back. 'Blow the horn, and tap the tambourine; Close the gap of the dark years in between... Fare thee well now.' RIP," researcher Danah Boyd tweeted.