On at least half a dozen occasions in recent years—often on the sidelines of some swell D.C. media party or Bay Area tech conference—I have found myself in the company of Jim Steyer, the perpetually buoyant lawyer, children’s advocate, Stanford professor, and man–around–media executives. Jim is perhaps best known as the founder of Common Sense Media, which he launched more than two decades ago as a practical guide for parents trying to navigate movies, television, music, and video games. Today, the organization has evolved into a global child-advocacy platform confronting the most powerful technology companies in the world over social media, privacy, and now, artificial intelligence.