The evidence suggests that social media is making us sadder, angrier, less empathetic, more fearful, more isolated and more tribal. Jaron Lanier is the world-famous Silicon Valley scientist-pioneer who first alerted us to the dangers of social media. In this witty and urgent manifesto he explains why its toxic effects are at the heart of its design, and, in ten simple arguments, why liberating yourself from its hold will transform your life and the world for the better.