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114 From that I went on to assume how the splitting of the human species came about. I dare say you will anticipate what shape my theory took, though I soon felt it was still short of the truth of the case.

"But at first, starting from the problems of our own age, it seemed as clear as daylight to me that the gradual widening of the present merely temporary and social difference of the capitalist from the laborer was the key to the explanation. No doubt it will seem grotesque enough to you and wildly incredible, and yet even now there are circumstances that point in the way things have gone. There is a tendency plainly enough to utilize underground space for the less ornamental purposes of civilization; there is the Metropolitan Railway in London, for instance, and all these new electric railways; there are subways, and underground workrooms, restaurants, and so forth. Evidently,