Tristan Harris believes that many technology companies have gone too far. They are tapping into base desires and fears hardwired into our primitive animal brains to keep people hooked on social media. The result is what he calls “human downgrading” which is leading to a wide range of social ills, from depression to political polarization. Harris is a world expert on how technology steers us all, the former Design Ethicist at Google who left to co-found the Center for Humane Technology, and he was our featured guest at What’s Now: San Francisco in November.