When in the struggle for existence the fittest came to be measured by degrees of intelligence, and no longer by superiority of bodily structure, climatic conditions were still powerful to modify and stimulate thought. The increase in intelligence due to these agents did not develop a new species, for, to whatever heights he rises, man still remains Homo sapiens. If, then, the specific identity of all individual men on the globe to-day is true, the superstitions which we have studied are errors of minds like our own, but imperfectly developed and modified by environment. In her mistakes, said the great naturalist Geoffroy St. Hilaire, nature betrays her secrets. By a study of erroneous working of the mind and their probable causes we can discover the nature of mind. Below all ceremonials among all men, savage or barbarous, may be traced aspirations akin to our own since they spring from our common nature. Until some philosopher shall arise who can so analyze environment as to demonstrate that the great religious teachers of man, who, suddenly appearing, have stimulated the race to great bounds in progress, were solely the products of surroundings, we may believe that there is another most potent influence behind environment controlling the development of culture. Throughout all history man, from his own consciousness, has recognized that controlling influence to be higher than environment, and no science nor philosophy has yet succeeded in banishing the thought from his mind.