I'm not sure what you are trying to say. I think we will have difficulty having a discussion if you want to debate what "justly acquired" means... I don't think anything is ever mentioned anywhere on the website or in the book regarding a "completely free society", at least no one is advocating for one... They even partially expand on this saying that some government is necessary.
As far as "justly acquired" goes, I guess you could use one of the definitions of value that real property appraisers often use:
Market value is the amount in cash, or on terms reasonably equivalent to cash, for which in all probability the property would have sold on the effective date of the appraisal, after a reasonable exposure time on the open market, from a willing and reasonably knowledgeable seller to a willing and reasonably knowledgeable buyer, with neither acting under any compulsion to buy or sell, giving due consideration to all available economic uses of the property at the time of the appraisal.
Using this definition as the basis of my definition for "justly acquired", I define justly acquired as the purchase of property with cash, or on terms reasonably equivalent to cash, from a
willing and reasonably knowledgeable seller to a
willing and reasonably knowledgeable buyer, with neither acting under any compulsion to buy or sell, giving due consideration to all available economic uses of the property at the time of purchase.
Again, I don't understand what you are trying to say; are you trying to say that private possession of land and its resources is antithetical to a free society? If so, I would argue that opposite; that private property is basis of freedom, but that is my opinion.
I still think that you might adhere and believe in many of the ideals of the Austrian School of Economics,
is this what you mean regarding your comment about private property? That is what Ludwig von Mises believed and wrote regarding private property.