Allodial title constitutes ownership of real property (land, buildings and fixtures) that is independent of any superior landlord. Allodial title is related to the concept of land held "in allodium", or land ownership by occupancy and defense of the land. Historically, much of land was uninhabited and could therefore be held "in allodium". In the modern developed world, true allodial title is only possible for nation state governments. Although the word "allodial" has been used in the context of private ownership in a few states of the United States, this ownership is still restricted by governmental authority; the word 'allodial' in these cases describes land with fewer but still significant governmental restrictions.