Here is the interesting twist:[McLeod] Campbell came to his views through reading Jonathan Edwards who suggested at one point in his ruminations on the atonement that Christ could have offered up a perfect act of penitence instead of punishment, and that this would have been an acceptable offering suitable to remit our sinfulness.

For instance, there are many mainstream Reformed theologians that deny the doctrine of "limited" atonement (the "L" in TULIP, the acrostic for the Five Points of Calvinism). These are not thinkers on the margins or troublemakers. They are leaders at the center of Reformed thinking like Bishop John Davenant.

[Jonathan Edwards] he has to be engaged with on this issue if you're writing about Calvinism as I am in this book.

That is the great contribution of Reformed thinking to the Christian church: theology for a life well-lived.

[John] Calvin is revered as a thinker of immense importance in Reformed thought, Jonathan Edwards could say in his preface to his treatise on Freedom of the Will that he had derived none of his views from the work of Calvin, though he was willing to be called a "Calvinist" for the sake of convention.

[Jonathan] Edwards definitely shows up in the book [Saving Calvinism]. He appears as one of the interlocutors in the chapter on free will, the other being the Southern Presbyterian theologian John Girardeau.

In the twentieth century the Reformed tradition was developed in several ways including additional confessions (Barmen, the Belhar Confession, the 1967 Confession of the PC(USA), and so on). It was also significantly augmented by the work of important thinkers like Karl Barth, T. F. Torrance, Jürgen Moltmann, Emil Brunner, Kathryn Tanner, and so on.