The global economy is getting a hardware refit and trying out a new operating system-in effect, a full reboot, the likes of which we have not seen in nearly a century. To understand why this is happening and what it means, we need to abandon any illusion that the worldwide turn toward right-wing populism and economic nationalism is merely a temporary error, and that everything will eventually snap back to the relatively benign world of the late 1990s and early 2000s.