Bit of a disagreement here. I would suggest that the foraging "civilization" doesn't have property rights as we know them. So there is no conflict of property rights. There is a conflict between a society that has such rights and one that doesn't recognize them at all. (Tribal territory, used by custom, isn't the same thing at as a property right.)
he difference is that both the farming civilization and the foraging civilization are complete and self-sufficient systems of rights.But I would stand by the text as written. "Property" is no more that a collection of rightful actions with respect to an inanimate object. An Indian system of foraging rights, although is non-exclusive, still qualifies as property as it describes what is and what isn't rightful to do in a wilderness.
What is the basis of a "natural" right to property, and if it is natural, pre-existing law, then explain for me how it applies only to some human beings? I think you hang quite a lot on that phrase "as we know them." Are natural rights so completely open to interpretation that whole ways of life are beyond their scope?