If you don’t presently own any firearms, you may have been considering taking that step in order to protect yourself and your family. Or perhaps you already have what you consider to be an adequate home armory, but is it really enough? In the event that our economy tanks, one certain outcome will be much higher levels of criminal violence. Read Fernando Aguirre’s excellent “The Modern Survival Manual: Surviving the Economic Collapse,” based on his experiences in Argentina after 2001, to see what happens to civil society when a national currency collapses and the banks are closed. Today’s career criminals...