The alternative of hypothetical universalism, according to which Christ's work is sufficient for all but efficient only for the elect, was alive and well in early Reformed thought. Moreover - and importantly for our purposes - this view was not regarded as an aberration but as a legitimate position that could be taken within the confessional bounds of Reformed thought. But that means that the Five Points aren't the non-negotiable conceptual core of Calvinism after all.
Oliver D. Crisp[John] Calvin's Institutes is often called a summary of Christian piety. You can't say that about many modern works of theology. You can say it of Calvin.
Oliver D. CrispIn 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, Jรผrgen Moltmann, Emil Brunner, Kathryn Tanner, and so on.
Oliver D. Crisp[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.
Oliver D. Crisp