Is property ownership sustainable?

I have been questioning this for some time. Given the finite amount of property available on the planet, it seems somewhat 'random' that future generations will only be able to acquire their piece of land through inheritance or great wealth. So historical 'haves' simply have an unassailable position over the 'have nots'; tough! Is that sustainable? Those of us living in Africa have seen hallowed 'title' swept aside quite recently. An interesting analogy is the voluntary abandonment of title in the Scottish countryside by Londoners when they realised that local villagers did not welcome them as weekend visitors. It seems to me that property, like air, might belong to community rather than individuals and that there will be a future trend in that direction. This discussion may also apply to resources such as hydrocarbons...