The survey linked below, which is fairly comprehensive, mentions astonishingly few major modern psychologists who strongly identified themselves as Christians. James McCosh of Princeton University is one, but apparently many major psychologists in the late nineteenth and early twentieth centuries were unfriendly toward Christianity or saw it merely as an object of study. Many of these people even psychology as a kind of replacement for Christianity. This might help explain why such convinced Christians as Flannery O'Connor were often hostile, in turn, toward psychology. O'Connor often mentions Freudianism and Jungianism as if they were in competition with Christianity.