This Monday, the Swedish government began distributing a new pamphlet to millions of its citizens, telling them how to prepare for a sudden and unexpected war. This guide, called "In Case of Crisis of War," is an updated version of a similar booklet first issued six years ago. But things have changed dramatically since then.

Sweden is now a member of NATO, and the world is on edge with the ongoing war in Ukraine. The Swedish government’s new survival guide reflects these changes. With te...