The important impact of the French Franciscan Peter Auriol (ca. 1280-1322) upon contemporary philosophical theology at Oxford is well known and has been well documented and analyzed, at least for a narrow range of issues, particularly in epistemology. This article attempts a more systematic treatment of his effects upon Oxford debates across a broader range of subjects and over a more expansive duration of time than has been done previously. Topics discussed include grace and merit, future contingents and divine foreknowledge, (...) and the logic of the Trinity. (shrink)