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We have traced a distinct tendency towards explanation—which already took shape in the struggle between disciplines for supremacy—in the development of particular discoveries into general principles. But in so doing we already proceeded to the second phase of development of a general science which we have mentioned in passing above. In the first phase, which is determined by the tendency towards generalization, the general science is at bottom quantitatively different from the special ones. In the second phase—the phase in which the tendency towards explanation predominates—the internal structure of the general science is already qualitatively distinct from the special disciplines. Not all sciences, as we will see,