What harm could there be in getting people to think about these terrible risks?

Viktor Vasnetsov’s 1887 painting Four Horsemen of the Apocalypse depicts the Christian vision of the end of the world: Death, Famine, War and Conquestriding out to herald the Day of Judgment. At first glance, one might think that the more thought we give to existential risks, thebetter. The stakes, quite literally, could not be higher. […]