I'm sure the poster had other thoughts besides munitions.
If there is a lesson here, it is that all things are finite.
Civilisations run out of water (Chaco Canyon) and half a millenium later another civilization is making the same mistake, building giant steel frame kokopellis and yei dancers to bring fire to our mega campfires and hoarding weapons for when the lights do go out.
I've only known one 'survival kit' item that was truly timeless.
I was working a Wyoming prehistoric bison kill site and uncovered with a stroke of camelhair ( another peer of the long vanished giant bison) the clovis dart point that had slipped past ribs and into some vital organ.Once I had photographed and plotted it on my unit map, I excitedly picked up up. And in my haste, that @ 8,000 year old, still one molecule thick at the edge artifact neatly slit a cut in my left thumbs fleshy palm area 3" long, the scar still visible.
It's sort of futile, standing with blood pouring all over and getting mad at some guy who's dust is scattered beyond identification because human nature is to always blame something, somebody for our own stupidity.
So just keep rotating those lighters, shotgun shells and fruitcakes. And when you do, take stock of your own mental freshness, keep it as sharp as that dart point.