In the modern world, political struggle has largely shifted to the realm of social media. Politicians—especially those in power—either personally or through the staff at their disposal monitor who says or writes what about them on various platforms, and respond to those posts in a way that fits their own views. Here, several approaches are possible. In rigid authoritarian states such as Russia, China, and others, the authorities take a radical approach: they simply ban social platforms, understanding that not everyone will be willing to bypass…

• 22 November 11:00