At the heart of this series is a bit sympathy for the devil.
To up it bluntly - boredom. You want the devil to run amock and bring fire and destruction on the planet, but he can't. Instead, he becomes a maid.
It may not necessarily be a bad thing. Poki likes to point out that it could be a sign of adaptation as we tolerate living one another in a more confined space. The world has arrived at a point where there are simply no room for the kinds of dramatic wars of the past. If you bring appocalypse back into the picture, then all of a sudden men would have their old jobs back again. Instead of serving coffee and cleaning rooms they can pick up a weapon in defense of their love ones. Like Nazi generals at the Nurembourg trials who said they wanted to defend western civilization.
You look at the Nazi generals now and you go, now that's quaint