The Chalcedonian Definition of 451 never completely resolved one of the critical issues at the heart of Christianity: the unity of the ''person'' of Christ. In this eagerly-awaited volume - the result of deep and sustained reflection - distinguished theologian Bruce Lindley McCormack examines the reasons for this philosophical and theological failure. His book serves as a critical history that traces modern attempts at resolution of this problem, from the nineteenth-century Lutheran emphasis on Kenoticism (or the ''self-emptying'' of the Son in order to be receptive to the will of the Father) to post-Barthian efforts that evade the issue by collapsing the second person of the Trinity into the human Jesus - thereby rejecting altogether the logic of the classical ''two-natures'' Christology. McCormack shows how New Testament Christologies both limit and authorize ontological reflection, and in so doing offers a distinctively Reformed version of Kenoticism. Proposing a new and bold divine