A study of the several charts of this work with regard to the kind of knowledge which favors disbelief shows that the historians and the physical scientists provide the greater; and the psychologists, the sociologists and the biologists, the smaller number of believers. The explanation I have offered is that psychologists, sociologists, and biologists in very large numbers have come to recognize fixed orderliness in organic and psychic life, and not merely in inorganic existence; while frequently physical scientists have recognized the presence of invariable law in the inorganic world only. The belief in a personal God as defined for the purpose of our investigation is, therefore, less often possible to students of psychic and of organic life than to physical scientists. The place occupied by the historians next to the physical scientists would indicate that for the present the reign of law is not so clearly revealed in the events with which history deals as in biology, economics, and psychology. A large number of historians continue to see the hand of God in human affairs. The influence, destructive of Christian beliefs, attributed in this interpretation to more intimate knowledge of organic and psychic life, appears incontrovertibly, as far as psychic life is concerned, in the remarkable fact that whereas in every other group the number of believers in immortality is greater than that in God, among the psychologists the reverse is true; the number of believers in immortality among the greater psychologists sinks to 8.8 per cent. One may affirm it seems that, in general, the greater the ability of the psychologist, the more difficult it becomes for him to believe in the continuation of individual life after bodily death. Within the generation to which I belong Darwin and Marx, the greatest teachers that the world has had, went over the top of entrenched ignorance with the greatest books of the world, worth infinitely more to it than all its bibles together. Darwin did this in 1859 with his Origin of Species by Natural Selection and Marx in 1867 with his Capital, a Critique of Political Economy.