In 1998, Jeff Bezos had a vision for the Internet. At that time he was four years into building Amazon. It was taking off as a humongous online emporium of books and music. In an interview with the Washington Post that year, Bezos made a visionary statement about the web. “If we have 4.5 million customers, we shouldn’t have one store. We should have 4.5 million stores,” he said.

Fast-forward 19 years and here we are in 2017. My Amazon homepage is extremely personalized to me. (In August it was showing me glow sticks and solar-powered lamps. It clearly knew I was going to Burning Man.)