Imagine you visit a totally alien island, and have no knowledge of manners, ethics, morals, traditions myths, rituals, laws, institutions, and metaphysical value judgments.
History is replete with the difficulty of establishing communication, trust, cooperation, trade, and especially, non-conflict.
But because of natural laws we can start from the lowest methods of communication: giving gifts, and avoiding threats, while maintaining capable defense.
It is these lowest common denominators that we refer to with ‘natural law’.
*Impose no cost, nor threaten to impose a cost, upon those who have expended efforts in the accumulation of whatever reproductive, productive, institutional, and territorial assets that they have.