The internet today isn't what Tim Berners-Lee pictured when he invented the World Wide Web nearly three decades ago.
Speaking to CNBC at the Web Summit tech conference in Lisbon Monday, Berners-Lee said the web is "at a tipping point" as it faces threats like market concentration, data breaches and so-called "fake news."
"For a long time, 20 years, I thought all I had to do was keep it, just keep it free and open and people will do wonderful things," Berners-Lee told CNBC's Karen Tso. "Then in fact if you look and talk to people on the street now there's been a big change. I think this has been been a tipping point."