I'd imagine it to do with lack of awareness of the Land as a factor of production, also owed to Marxism, which resisted the notion of Capital as the root of all evil, so it did not want to concern itself with the Land too much (Marx was somewhat critical of Henry George due to that at least). But capital is just labor enclosed by those most eager to monopolize and monetize (edit: but I think it is legitimate if practiced in moderation,e.g. if properly taxed where excess comes increasingly at the cost of everyone's Land access.), so marxism went nowhere and public awareness of commons and public inheritance (e.g. Charter of the Forest, https://www.youtube.com/watch?v=ltiRaKmj-sw https://www.youtube.com/watch?v=S1NfU4Udckw ), Land in general (in the sense of economic opportunity, as outlined here: https://www.youtube.com/watch?v=2JjxwgH6j5g ), has been low in the recent history.