The right to private property is every bit as natural as the right to one's own body. Both come from the act of appropriating natural resources and converting it into something of greater value that is personally useful, and making exclusive of the resulting property.

>What you can or can't own depends on the circumstances.

You're confusing the act of protecting a right with the right itself. A right does not cease to exist because the law fails to protect it.

"Both come from the act of appropriating natural resources and converting it into something of greater value that is personally useful"

Where is that written?

I would like to point to you that your "private property", including your own body, could be considered as a "natural resource" ready to be exploited by other agents in the environment.

I doubt that throwing copies of "Atlas Shrugged" to their heads is going to change their mind (even signed copies!).

>Where is that written?

That is how property has historically been justified. Read up on property rights if you want to learn more about it.

>I would like to point to you that your "private property", including your own body, could be considered as a "natural resource" ready to be exploited by other agents in the environment.

The principle of property rights is that you cannot make use of natural resources that have already been appropriated and turned into someone else's property, so no, another person couldn't simply exploit my property/body under the property rights framework.