The internet is perhaps the defining technological advance of the last fifty years. It has opened up a new world of possibilities, but what if it also represents an existential threat to humanity? That is the alarming possibility raised by computer scientist Jaron Lanier. He is no tech-phobic sensationalist; he is a Silicon Valley insider who was a hugely influential pioneer in Virtual Reality and a consultant to some of the biggest tech giants. In what ways are we sowing the seeds of our own destruction?(Photo: Jaron Lanier in the Hardtalk studio)