I'd say that's a false dichotomy, my friend.
Natural Law *is* God's law -- and that's the basis for a just civil society. This law, written on every heart (Romans 2), has been known as the _lex talionis_ (the law of retribution), "eye for an eye," the "light of nature," the "law of nature," etc. Even the pagans know this law ("things that ought not to be done." [Gen. 20:9]). If this is all one means by "theocracy," that we ought to have civil laws like "don't hurt people and don't take their stuff," then--while I'd quibble with the terminology--fine. But normally "theocracy" is used quite differently.
Scripture and its story of redemption is for the church. The theocracy of Moses is over, and its civil laws were never meant to be an example for setting up a civil society--its civil and ecclesiastical laws, as the divines put it, "expired together with that state."
In other words...I'll see a "Bahnsen," and raise a "Vos."
🤙