The origin was when the State created the right to bequest against the clan and in favor of the family. That is when the modern State itself began.
Agreed Rightwhale, but I was just reading Justice Thomas' dissent, in which he explained that the framers considered property ownership a natural right. So, like all natural rights that we have (had), although the state was put in place to guarantee them, it did not provide them.
I have a feeling that the Magna Carta has a place in this discussion, perhaps you know where, if that is so?