Randy Barnett has written about 5 rights
i.e. to save someone's life you must perform an operation in this way.
Natural rights are not enforceable unless they also laws. But there are consequences of not following the natural rights.
If you want to live with peace and prosperity in close proximity, you need to define space.
We care about natural rights for the above reason
Good way of telling which countries are adhering to natural rights, is which way are people immigrating to or deserting to.