which exist in society by simply increasing our knowledge, or by becoming more religious, or by great economic changes and reforms. So long as this law exists in the nature of man, so long must any one of these remedies assuredly fail if tried alone. The great evils which curse the word have found their source not in one, but in every set of faculties which make up the complex mind of man. It is not difficult to make a social reform which shall be equally broad and definite. "One thing at a time" is not the law of growth in nature, either for evil or for good. In her work, many parts are in process of formation at the same time. It would be well for reformers to learn this profound lesson.
The great drama of human history has not been ruled by the caprices of statesmen and kings, nor by the unguided impulses of men. Despite all of its obstacles and windings, it has been an impressive and majestic procession, moving forward and upward under the dominion of eternal laws. These laws belong to the constitution of the human mind itself. And because the mind has for its central instrument the Brain, with its fixed and permanent groups of faculties, because of this fact we may trace on a map of the human brain all those extended phases in the historic growth of man.
If the mental faculties had not fixed locations in the brain, locations exactly adapted to the function which each one performs, if this were not the case, then all mental operations would be but a mass of disorder and uncertainty.
But these locations in the brain have been established by a whole century of scientific observation