In so far as the individual's inherited aptitudes or his training incline him to account for facts and sequences in other terms than those of causation or matter-of-fact, they lower his productive efficiency or industrial usefulness. This lowering of efficiency through a penchant for animistic methods of apprehending facts is especially apparent when taken in the mass-when a given population with an animistic turn is viewed as a whole. The economic drawbacks of animism are more patent and its consequences are more far-reaching under the modern system of large industry than under any other. In the modern industrial communities, industry is, to a constantly increasing extent, being organized in a comprehensive system of organs and functions mutually conditioning one another; and therefore freedom from all bias in the causal apprehension of phenomena grows constantly more requisite to efficiency on the part of the men concerned in industry. Under a system of handicraft an advantage in dexterity, diligence, muscular force, or endurance may, in a very large measure, offset such a bias in the habits of thought of the workmen. Similarly in agricultural industry of the traditional kind, which closely resembles handicraft in the nature of the demands made upon the workman. In both, the workman is himself the prime mover chiefly depended upon, and the natural forces engaged are in large part apprehended as inscrutable and fortuitous agencies, whose working lies beyond the workman's control or discretion. In popular apprehension there is in these forms of industry relatively little of the industrial process left to the fateful swing of a comprehensive mechanical sequence which must be comprehended in terms of causation and to which the operations of industry and the movements of the workmen must be adapted. As industrial methods develop, the virtues of the handicraftsman count for less and less as an offset to scanty intelligence or a halting acceptance of the sequence of cause and effect. The industrial organization assumes more and more of the character of a mechanism, in which it is man's office to discriminate and select what natural forces shall work out their effects in his service. The workman's part in industry changes from that of a prime mover to that of discrimination and valuation of quantitative sequences and mechanical facts. The faculty of a ready apprehension and unbiased appreciation of causes in his environment grows in relative economic importance and any element in the complex of his habits of thought which intrudes a bias at variance with this ready appreciation of matter-of-fact sequence gains proportionately in importance as a disturbing element acting to lower his industrial usefulness. Through its cumulative effect upon the habitual attitude of the population, even a slight or inconspicuous bias towards accounting for everyday facts by recourse to other ground than