> If you are alone on a island, there is no one to say you don't own it
Ownership has no meaning unless you can identify who does not have it, which requires at least one other person nearby. If you are alone on an island, you are just occupying it.
> Similarly, you can own land without social dependence if you have the power take or defend it.
This requires an army or militia, or an overwhelming technological advantage over those you are dispossessing. Those imply operating in a societ. Otherwise where does your militia and technology come from?
Ownership has no meaning unless you can identify who does not have it, which requires at least one other person nearby. If you are alone on an island, you are just occupying it.
> Similarly, you can own land without social dependence if you have the power take or defend it.
This requires an army or militia, or an overwhelming technological advantage over those you are dispossessing. Those imply operating in a societ. Otherwise where does your militia and technology come from?