We have no reason to enter into the discussion of another often and much debated question, which is connected with the primitive history of man; namely, {339} _whether mankind is descended from one or more pairs of men_. We pass it by; because it has no connection whatever with the acceptance or rejection of the Darwinian ideas, and since it is not yet archaeologically and scientifically solvable. There are Darwinians who think monogenetically, and others who think polygenetically; and there is still a third class--and they speak most correctly--who acknowledge that they know nothing about it. Besides, we can also pass by this question, for the reason that in spite of the important place which it occupies in the theological system of St. Paul, we have no right to assign to it, in the form in which we put it, the decisive dogmatic importance which it still occupies in many conceptions of Christian theology. For we cannot question the right of the natural sciences to enter into the discussion of this question, and to look for a solution of it. As soon as we make this concession, it necessarily and naturally follows from it, that we must no longer make the substance and truth of our religious possession, even in a subordinate manner, dependent on the results of exact investigations: for our religious possessions have too deep a basis of truth, to permit us to ground them on the results of investigations in a realm so dark for science and so far removed from religious interest. As to this question, we may hope for a future solution in the monogenetic sense: we may rejoice over the fact that, according to the present state of knowledge, the needle of the scale rather inclines in favor of a oneness of origin of mankind; but we must also be prepared to accept the possibility of a contrary result, without being afraid that in such a case we should have to abandon at once that religious factor {340} for whose sake the advocates of a monogenetic descent might defend their view. This religious (and, we may add, quite as strong ethic) factor consists in the idea of the intimate unity and brotherhood of mankind. We must absolutely adhere to this idea; for it is in opposition to the particularism which, quite without exception, governed the entire old world, even its most highly developed nations, and which was only penetrated by some beams of hope and prediction in the prophecy of Israel--one of the most beautiful and blissful gifts of Christianity to mankind. This idea still contains, as ethical motive, one of the strongest, most indispensable, and most promising forces in the world. If this idea shall be a real and lastingly effective one, it certainly must also have its real basis in the history of the origin of mankind. But, we must ask, is the only conceivable reality of this basis a monogenetic pedigree, and do we lose this reality if science should once find that mankind came into existence not only in one single pair, but in several pairs, even in