David Hume,
Treatise of Human Nature/Book 3…
(1739)
“ Nature has, therefore, trusted this affair entirely to the conduct of men, and has not plac'd in the mind any peculiar original principles, to determine us to a set of actions, into which the other principles of our frame and constitution were sufficient to lead us. And to convince us the more fully of this truth, we may here stop a moment, and from a review of the preceding reasoning's may draw some new arguments, to prove that those laws, however necessary, are entirely artificial, and of human invention; and consequently that justice is an artificial, and not a natural virtue. ”
