Enery is the secret
Well, it is not really "secret" as being unknown, more as the key. If you have plenty of cheap enough energy then you can recycle the elements used to create past crap Xmas toys, etc, from the landfill in to something you really need and want right now, like the latest Orgaimator2000 robotic dildo or whatever.
I'm not sure how an economist would see it, but if someone succeeds in generating a lot of energy cheaply and reliably and without needing resources in a few politically unstable regions of the world, a lot of societies problems would be over.
Except maybe over-population, but decent education and an endless supply of the Orgaimator2000 should see to that....