In a previous post I posed some questions about David VanDrunen’s defense of Two-Kingdom (2K) doctrine and raised a general objection to his position (and to similar 2K views). In response to a comment on that thread, I tried to boil down the objection as follows. On my reading, VanDrunen seems to be committed to all of the following claims:
(K1) When living as citizens of the common kingdom, people should observe the moral standard of that kingdom.
(K2) The moral standard for the common kingdom is natural law (and only natural law).
(K3) When living as citizens of the common kingdom, Christians should observe the distinction between the two kingdoms.
(K4) It is not a deliverance of natural law that Christians should observe the distinction between the two kingdoms.
In a nutshell, my objection is that these claims form an inconsistent set: they can’t all be true. So the question is whether 2K advocates really are committed to all four claims, and if not, which do they reject.