So it is clear at last. The real reason, apparent after Edward Snowden’s and Bradley Manning’s revelations, for the popularity of all those dumb zombie films is that every value that Westerners grew up cherishing since the Second World War is now dead or dying, reduced to ravenous corpses shambling along, controlled by authorities as cold-blooded themselves as zombies, and all transformed from human beings into grim creatures devouring anyone showing a spark of humanity.