I would characterize that more as a function of a diversifying and growing economy than a diminishment. The pie got much larger, so land holders' relative posit

I would characterize that more as a function of a diversifying and growing economy than a diminishment. The pie got much larger, so land holders' relative position diminished, but their absolute wealth still increased. An acre of land in medieval Paris exchanges for far less wealth than the same acre in 2012 Paris, even though the social status it conveys has diminished. Furthermore, while I like the concept of not owning anything, I suspect that won't be remotely feasible until we engineer energy sources that provide 2+ orders of magnitude more energy than we currently consume, for 2+ orders of magnitude less cost. Holding onto material goods is another way of expressing an economic preference to not have to expend the energy it required to obtain the goods in the first place.