Resources on the Two Kingdoms
I was asked by a parishioner recently about what essential reading is there on the idea of the "two kingdoms," that is, how Christ rules over all things yet through two means, the civil kingdom (what Luther called the kingdom on the left hand) the spiritual kingdom (what Luther called the kingdom of the right hand)? So I asked my good friend, Dr. David VanDrunen of Westminster Seminary California, and here is what he gave as a bibliography:
Martin Luther, “Temporal Authority,” vol.45 in Luther’s Works ($15 used at Amazon)
John Calvin, Institutes, Book 3, Chapter 14, 15, 16, and Book 4, Chapter 20 (Especially sections 1 and 2)
Church of Scotland, Second Book of Discipline, Chapter 1
Francis Turretin, Institutes, 2.486–90; 3.278–81 (3 vols for $78 at Amazon)
George Gillespie, Aaron’s Rod Blossoming, Book 2, Chapter 5
Wilhelmus a Brakel, The Christian’s Reasonable Service, 1.561–66 (4 vols for $90 at Reformation Heritage Books)
Stuart Robinson, The Church of God, (Epecially pp. 84–86)
Darryl Hart, A Secular Faith, ($18 at Amazon)
David VanDrunen, A Biblical Case for Natural Law, Chapter 3 ($6 at the Acton Institute)
David VanDrunen, “The Two Kingdoms: A Reassessment of the Transformationist Calvin,” Calvin Theological Journal 40 (Nov 2005): 248–66.
David VanDrunen, “The Two Kingdoms Doctrine and the Relationship of Church and State in the Early Reformed Tradition,” Journal of Church and State 49 (Autumn 2007): 743–63.

Reader Comments (6)
“Whereas individuals are encouraged to invest themselves in ‘things civil,’ the church, as a visible and constitutional organization, ought to be exclusively concerned for ‘things spiritual.’ This apolitical church resists the marginalization of theology and its subsequent realignment around a cultural agenda. The modern apolitical church serves to proclaim a gospel that transcends social restructuring, macroeconomics and political theory…even by Robinson’s own admission and practice, the line distinguishing things sacred from things secular is not always easy to discern, especially in the messiness associated with congregational life in general, especially when her people are called to participate in the world without being of the world. And yet this didn’t eliminate the responsibility of the church to draw the line all the same as from where scripture speaks and where it is left to human wisdom…His polemic was against the church confusing a political agenda after a reading of one or another political or social theory rather than agenda that still holds to things pertaining to God and faith as important in their own right. For example, such a church might preach justice, albeit to congregates who perhaps endorse opposing theories for the accomplishment of justice as derived from the social, economic, legal, and political sciences. Such a church may foster in its people works of mercy directed toward those who are needy, as an expression of true Christian love and witness, and yet be silent as to which particular program for accomplishing mercy is necessarily preferable given one or another reading of city planning….Robinson’s Scoto-American idea of the church would be distinguished as the ‘mediatorial body of Christ’ acting as an agent of special grace for God the Redeemer, in contrast with acting as an agent of common grace along with the state for God as creator.”
Samuel Rutherford's Lex Rex (mid-17th century) is also an important historical source.
DVD's bibliography is not comprehensive, as I said, but representative of the basic and essential things he would point a parishioner to.
Thanks for the interaction.
kazoo