The birth of a new species took place in one of two ways: Either to those materials and forces which formed the germ of the new species, were added entirely new metaphysical agencies which did not exist before, and only the basis and the frame within which the new appeared, or that which the new species has in common with the old mother-species had the cause of its existence in the preceding. Likewise even the original productions {262} of man are always composed of two factors--of the given pre-suppositions and conditions, and of the new which on their basis and within their frame comes into existence. Otherwise the causes of the new which was to originate already lay in all former stages, but were still latent and still hindered in their activity, and only at the time of the birth the new impulse came which set them free for their activity. This new impulse may very well belong to the causal connection of the universe, and be caused by something analogous to natural selection. In the first case, which in its application to the origin of man is adopted by A. R. Wallace and Karl Snell, the reconciliation between descent and theism has not the least difficulty; for if the agency which in the new-appearing species produces that which is specifically new in it, came only into existence with the first formation of the germs of the new species in the mother-species, this new certainly cannot have its origin anywhere else than in the supermundane _prima causa_ in the Creator and Lord of the world.