IN the earliest days of his upward evolution man was satisfied with a very crude explanation of natural phenomena--that to which the name "animism" has been given. In this stage of mental development all the various forces of Nature are personified: the rushing torrent, the devastating fire, the wind rustling the forest leaves--in the mind of the animistic savage all these are personalities, spirits, like himself, but animated by motives more or less antagonistic to him. I suppose that no…