“The issue is not merely one of false stories, incorrect facts, or even election campaigns and spin doctors: the social media algorithms themselves encourage false perceptions of the world. People click on the news they want to hear; Facebook, YouTube and Google then show them more of whatever it is that they already favor, whether it is a certain brand of soap or a particular form of politics. The algorithms radicalize those who use them too. If you click on perfectly legitimate anti-immigration YouTube sites, for example, these can lead you quickly, in just a few more clicks, to white nationalist sites and then to violent xenophobic sites. Because they have been designed to keep you online, the algorithms also favor emotions, especially anger and fear. And because the sites are addictive, they affect people in ways they don’t expect. Anger becomes a habit. Divisiveness becomes normal.”