The notion that parliamentary politics in the days of William III and Queen Anne revolved around the conflict of the Whig and Tory parties is deeply rooted in the historiography of the later seventeenth century. Nourished by the many contemporary references to the existence and activities of the Whig and Tory parties, the “two-party concept” had its first flowering in the nineteenth century and came to full blossom in the early decades of the twentieth in the works of W. C. Abbott, K. G. Feiling, W. T. Morgan, and G. M. Trevelyan.
The canons of orthodoxy of one generation of historians, however, have often proved to be little more than the cannon fodder of their successors. In this case, it was one of Abbott's own students, Robert Walcott, who has led the way in the task of reinterpretation. As early as 1941, Walcott — remarking upon the obscurity enveloping accounts of party groupings in the period 1689 to 1714 — advanced the hypothesis that “the description of party organization under William and Anne which Trevelyan suggested in his Romanes Lecture on the two-party system is less applicable to our period than the detailed picture of eighteenth-century politics which emerges from Professor Namier's volumes on the Age of Newcastle.”
Walcott's invocation of Sir Lewis's studies of mid-eighteenth-century politics was, of course, a testimony to the advance in historical methodology that had gained prominence with the appearance in 1929 of The Structure of Politics at the Accession of George III.