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 up favourite doctrines as intuitive truths, and deems intuition to be the voice of Nature and of God, speaking with an authority higher than that of our reason. In particular, I have long felt that the prevailing tendency to regard all the marked distinctions of human character as innate, and in the main indelible, and to ignore the irresistible proofs that by far the greater part of those differences, whether between individuals, races, or sexes, are such as not only might but naturally would be produced by differences in circumstances, is one of the chief hindrances to the rational treatment of great social questions, and one of the greatest stumbling blocks to human improvement. This tendency has its source in the intuitional metaphysics which characterized the reaction of the nineteenth century against the eighteenth, and it is a tendency so agreeable to human indolence, as well as to conservative interests generally, that unless attacked at the very root, it is sure to be carried to even a greater length than is really justified by the more moderate forms of the intuitional philosophy. That philosophy, not always in its moderate forms, had ruled the thought of Europe for the greater part of a century. My father’s Analysis of the Mind, my own Logic, and Professor Bain’s great treatise, had attempted to re-introduce a better mode of philosophizing, latterly with quite as much success as