rights are agreements (human abstractions) between beings which furthers the net ends of their goals.
rights are not universal in that a being who has never been informed of this 'rights agreement' should not/cannot assume to have knowledge of their existance.
by definition, rights cannot be assigned to beings or objects which cannot agree or reciprocate the agreement (animals have no rights, neither do stones).
well, thats what I think anyways... I just know what I see:
I can claim to have 'Property Rights' but if someone bigger, meaner, badder doesn't believe that I do, then we are back to 'might makes right' - which is why people should never be disarmed.
I can claim to have 'right to Life' but the lion in the jungle does not agree and views me as 'the perfect morsel to feed her cubs' - and she is ultimately correct.
just kitty food,
michael