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 nological line of descent by which the later of these two animistic apprehensions of propensity is derived from the earlier. This question may be of the gravest importance to folk-psychology or to the theory of the evolution of creeds and cults. The same is true of the more fundamental question whether the two are related at all as successive phases in a sequence of development. Reference is here made to the existence of these questions only to remark that the interest of the present discussion does not lie in that direction. So far as concerns economic theory, these two elements or phases of the belief in luck, or in an extra-causal trend or propensity in things, are of substantially the same character. They have an economic significance as habits of thought which affect the individual's habitual view of the facts and sequences with which he comes in contact, and which thereby affect the individual's serviceability for the industrial purpose. Therefore, apart from all question of the beauty, worth, or beneficence of any animistic belief, there is place for a discussion of their economic bearing on the serviceability of the individual as an economic factor, and especially as an industrial agent.

It has already been noted in an earlier connection, that in order to the highest serviceability in the complex industrial processes of to-day, the individual must be endowed with the aptitude and the habit of readily apprehending and relating facts in terms of causal sequence. Both as a whole and in its details, the industrial process is a process of quantitative causation. The "intelligence" demanded of the workman, as well as of the director of an industrial process, is little else than