Ongoing Incarnation: Would Christmas have come even if we had not sinned? (Philip Yancey, 1/10/2008, Christianity Today)
More than two centuries before the Reformation, a theological debate broke out that pitted theologian Thomas Aquinas against an upstart from Britain, John Duns Scotus. In essence, the debate circled around the question, "Would Christmas have occurred if humanity had not sinned?"
Whereas Aquinas viewed the Incarnation as God's remedy for a fallen planet, his contemporary saw much more at stake. For Duns Scotus, the Word becoming flesh as described in the prologue to John's Gospel must surely represent the Creator's primary design, not some kind of afterthought or Plan B. Aquinas pointed to passages emphasizing the Cross as God's redemptive response to a broken relationship. Duns Scotus cited passages from Ephesians and Colossians on the cosmic Christ, in whom all things have their origin, hold together, and move toward consummation.
Did Jesus visit this planet as an accommodation to human failure or as the center point of all creation?
Had He anticipated our sinfulness, God would have had no need to become Man in order to comprehend our plight, nor have despaired Himself when mortal.