Evangelical Calvinism is really a bubbling over of a variety of impetuses from within the history of Reformed theology. We look to the Scottish theology of Thomas Torrance, and the antecedent theology he looks to in the theology of John Calvin and also in the Scottish Kirk from yesteryear. We of course also look to the Swiss theology of Karl Barth towards offering a way forward in constructive ways in regard to where some of the historical antecedents trail off (primarily because they didn’t have the necessary formal and material theological resources available to them to finally make the turn that needed to be made in regard to a doctrine of election and other things).
In an attempt to identify this kind of movement, that has led to where we currently stand as Evangelical Calvinists, let me share from Charles Bell’s doctoral work on the Scottish theology that Torrance himself looked to in his own development as an evangelical Calvinist. Bell has been doing genealogical work with reference to various Scottish theologians, and also with reference to John Calvin, in his book. We meet up with Bell just as he is summarizing the development he has done on what is called the Marrow theology. This was theology that was developed in the late 17th and early 18th centuries by a group of twelve men; they sought to offer critique of the legalistic strain they discerned in the mainstream of Federal or Covenantal theology of their day, and hoped to place a priority of grace over law (which they believed their colleagues, the Federal theologians, had inverted thus providing for a legal faith) in regard to the covenantal system of theology. What Bell highlights though, is that while they discerned and even felt the pastoral problems provided by Federal theology, they themselves still did not have the wherewithal to remove themselves from that system; and so they suffered from a serious tension and irresolvable conflict in regard to the correction they saw needing to be made, and the way to actually accomplish that correction. Bell writes:
Boston and Erskine can only be fully appreciated against the background of 17th century Federal theology and the Marrow controversy. The Black Act of 1720 threatened the very heart of Reformed teaching concerning the nature of God’s grace. See in this context, it becomes highly significant that Boston and Erskine contend for the universal offer of Christ in the gospel, for such an offer is necessary to provide a basis for assurance. Not only do the Marrow men’s contemporary Federalists deny this universal offer, but they also deny that a basis for the assurance of faith is necessary since, according to them, assurance is not of the essence of faith. In light of the legalism which pervaded the Scottish scene, it is highly significant that men, who were themselves Federalists, detected this legalism and contended against it for the unconditional freeness of God’s grace. This they did by rejecting the covenant of redemption and insisting that there is but one covenant of grace, made for us by God in Christ. It is, therefore, a unilateral covenant which is not dependant or conditional upon our acts of faith, repentance, or obedience.
The Marrow men adhered to such doctrine precisely because they believed them to be both biblical and Reformed truths. Yet, because these men were Federal theologians, they were never able finally to break free of the problems engendered by the Federal theology. The Federal doctrines of two covenants, double predestination, and limited atonement undermined much of their teaching. So, for instance, the concept of a covenant of works obliged them to the priority of law over grace, and to a division between the spheres of nature and redemption. The doctrine of limited atonement removed the possibility of a universal offer of Christ in the gospel, and also removed the basis for assurance of salvation. Ultimately such teaching undermines one’s doctrine of God, causing us to doubt his love and veracity as revealed in the person and work of Christ. The Marrow controversy brought these problems to a head, but unfortunately failed to settle them in a satisfactory and lasting way. However, the stage is now set for the appearance of McLeod Campbell, who, like the Marrow men, saw the problems created by Federal Calvinism, but was able to break free from the Federal system, and therefore, to deal more effectively with the problems.
What I like about Bell’s assessment is his identification of a distinction in and among the Federal theologians themselves; the Marrow men represent how this distinction looked during this period of time. And yet as Bell details even these men were not able to finally overcome the restraints offered by the Federal system of theology; it wasn’t until John McLeod Campbell comes along in the 18th century where what the Marrow men were hoping to accomplish was inchoate[ly] accomplished by his work—but he paid a high price, he was considered a heretic by the standards of the mainstream Federal theologians (we’ll have to detail his theology later).
What I have come to realize is that while we can find promising streams, and even certain moods in the history, we will never be able to overcome the failings that such theologies (like the Federal system) offered because they were, in and of themselves, in self-referential ways, flawed. As much as I appreciate John Calvin’s theology I have to critique him along the same lines as Bell critiques the Marrow men here, even while being very appreciative for the nobility of their work given their historical situation and context. This is why, personally, I am so appreciative of Karl Barth (and Thomas Torrance); Barth recognized the real problem plaguing all of these past iterations of Reformed theology, it had to do with their doctrine of God qua election. It is something Barth notes with insight as he offers critique of Calvin, in regard to his double predestination and the problem of assurance that this poses (and this critique equally includes all subsequent developments of classical understanding of double predestination):
How can we have assurance in respect of our own election except by the Word of God? And how can even the Word of God give us assurance on this point if this Word, if this Jesus Christ, is not really the electing God, not the election itself, not our election, but only an elected means whereby the electing God—electing elsewhere and in some other way—executes that which he has decreed concerning those whom He has—elsewhere and in some other way—elected? The fact that Calvin in particular not only did not answer but did not even perceive this question is the decisive objection which we have to bring against his whole doctrine of predestination. The electing God of Calvin is a Deus nudus absconditus.
This was the problem the Marrow men needed to address; it is the problem that McLeod Campbell attempted to address with the resources he had available to him; and yet, I conclude that it was only Barth who was finally successful in making the turn towards a radically Christ concentrated doctrine of double predestination and election. With Barth’s revolutionary move here he washed away all the sins of the past in regard to the problems presented by being slavishly tied to classical double predestination and the metaphysics that supported that rubric.
This is why I am so against what is going on in conservative evangelical theology today (again, think of the ubiquitous impact and work The Gospel Coalition is having at the church level). The attempt is being made to retrieve and repristinate the Reformed past as that developed in the 16th and 17th centuries in particular; and the retrieval isn’t even of the Marrow men, it is of the theology that the Marrow men, as Federal theologians themselves, understood had fatal problems in regard to a doctrine of God and everything else subsequent. My question is: Why in the world would anybody want to resurrect such a system of theology? There is no theological vitality there; it can only set people up to repeat the history of the past, in regard to the type of Christian spirituality it offered. Indeed, a spirituality that caused people to be overly introspective, and focused on their relationship with God in voluntarist (i.e. intellectualist) and law-like ways (because of the emphasis of law over grace precisely because of the covenant of works as the preamble and definitive framework for the covenant of grace/redemption). People might mean well, but as far as I am concerned they are more concerned with retrieving a romantic idea about a period of history in Protestant theological development—an idea that for some reason they have imbued with sacrosanct sentimentality—rather than being concerned with actual and material theological conclusions. For my money it does not matter what period of church history we retain our theological categories from; my concern is that we find theological grammars and categories that best reflect and bear witness to the Gospel reality itself. Federal theology does not do that!
 M. Charles Bell, Calvin and Scottish Theology: The Doctrine of Assurance (Edinburgh: The Handsel Press, 1985), 168.
 Karl Barth, CD II/2:111. For further development of this critique, with particular reference to John Calvin, see my personal chapter, “Assurance is of the Essence of Saving Faith: Calvin, Barth, Torrance, and the “Faith of Christ,” in Myk Habets and Bobby Grow eds., Evangelical Calvinism: Volume 2: Dogmatics&Devotion (Eugene: OR, Pickwick Publications, 2017), 30-57.