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MIND AS A SOCIAL FACTOR. 569 tion. The essential characteristic of all intellectual action is invention. Glancing now at the ensemble of human achievement, which may be collectively called civilisation, we readily see that it is all the result of this inventive process. All practical art is merely the product of successful invention, and it requires no undue expansion of the term, nor extraordinary power of gene- ralisation, to see in all human institutions only modified forms of arts, and true products of the intellectual, or inventive, faculty. But what is the general result of all this ? An entirely new dispensation has been given to the world. All the materials and forces of nature have been thus placed completely under the control of one of the otherwise least powerful of the creatures inhabiting the earth. He has only to know them in order to become their master. Nature has thus been made the servant of man. Thus only has man succeeded in peopling the entire globe while all other animals are restricted to narrow faunal areas. He has also peopled certain portions far more densely than any other species could have done, and he seems destined to continue multiplying his numbers for a long time yet in the future. But this quantitative proof is even less telling than the qualitative. When we confine our attention to the elite of man- kind we do not need to have the ways specified in detail by which the powers of mind have exalted the intellectual being above all other products of creation. At the present moment the most dense and the most enlightened populations of the globe occupy what are termed temperate latitudes, which means latitudes hi which for from three to five months each year vegetation ceases entirely, the waters are locked in ice, and the temperature frequently sinks far below the zero of the Fahrenheit thermo- meter. Imagine the thin-skinned, furless animal man subsisting in such a climate. Extinguish his fires, banish his clothing, blot out the habitations that deck the civilised landscape. How long would the puny race survive? But these are not products of nature, they are products of art, the wages of thought fruits of the intellect. When a well-clothed philosopher on a bitter winter's night sits in a warm room well lighted for his purpose and writes on paper with pen and ink in the arbitrary characters of a highly developed language the statement that civilisation is the result of natural laws, and that man's duty is to let nature alone so that untraru- meled it may work out a higher civilisation, he simply ignores every circumstance of his existence and deliberately closes his eyes to every fact within the range of his faculties. If man had acted upon his theory there would have been no civilisation, and our philosopher would have remained a troglodyte. But how shall we distinguish this human, or anthropic, method from the method of nature '? Simply by reversing all the defini- tions. Art is the antithesis of nature. If we call one the natural