Sir Tim Berners-Lee, who 28 years ago this March 12 submitted a document laying out his vision for what would become the worldwide web , is proud of what his creation has become but he’s also concerned enough about certain issues that he’s released an open letter about them today through the Web Foundation . “[O]ver the past 12 months, I’ve become increasingly worried about three new trends, which I believe we must tackle in order for the web to fulfill its true potential as a tool which serves all of humanity,” Berners-Lee writes.