Hampton explains several things in this fascinating study. First, he explains how the Restoration Stuart period was not simply a monolithic collapse into Socinianism, but that there was a strong and vocal remnant of Reformed orthodoxy within the ranks of the Church of England. This is was accounts for the Evangelical awakening. Secondly, he notes that the descent in Socinianism was precipitated by the influence of Arminianism. This is what explains the shift toward moralism.
Something that is suggested, but not developed (because it was outside the scope of the book's subject) is that the fall of the Anglican Church into Socinianism and moralism is a direct result of a faulty doctrine of the Trinity – and that this faulty doctrine of the Trinity is at the heart of Arminianism. This explains why the Church of England's descent into Socinianism (i,e., denial of the Trinity, denial of Christ's deity, etc) came right on the heels of her acceptance of Arminian teachings on justification. Hampton closes the book with these statements:
“As we have seen, the major controversies in speculative theology which divided the post-Restoration Church, were sparked by an attempt to promote the new Arminian system. George Bull's Harmonia Apostolica is deeply marked by the influence of Simon Episcopius; William Sherlock's Vindication represents a creative development of the views of Jean Leclerc; Samuel Clarke's of the Scripture-Doctrine of the Trinity is little more than a republication of the Trinitarian teaching of Etienne de Courcelles. The defining controversies of this period are, in other words, the result of an Arminian gambit, and the Reformed reaction which it provoked.
“Admittedly, it was not the Reformed who finally saw off Samuel Clarke's version of Arianism; though they consistently advanced a Christology which ran counter to his. Nonetheless, it was precisely the Reformed response to Bull and then to Sherlock, which created the two controversies first on justification and then on the Trinity, which were the loudest intra-Anglican theological debates of the later seventeenth century. Lurking behind all these debates there was also a growing divide within the Church of England about the nature of God, a divide which resulted from the adoption of advanced Arminian ideas by Anglican writers.”