the place to look for his mutation would be in the direction of his drive, or in other words in the external things he deals with. And here we can indeed readily find evidence of mutation. The industrial revolution would then be indeed a true mutation, and the present tendency toward collectivism, whether attributed to Marx or Hitler or Henry Ford, might be as definite a mutation of the species as the lengthening neck of the evolving giraffe. For it must be that mutations take place in the direction of a species drive or preoccupation. If then this tendency toward collectivization is mutation
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