Amen brotherI doubt what was scarce during WWII would have any bearing on what will be scarce during the next major world conflict. The world is a very different place.
The one thing you will need to survive any major world affecting calamity, be it war, a solar event, asteroid strike or whatever... Can't be stockpiled or bought at REI. Its common sense and a will to survive. Having it is a lot better indicator of your chances than a years worth of freeze dried food or thousands of rounds of ammo.