But, in spite of the arbitrariness and incorrectness of the fundamental assumption of positive philosophy, it was accepted by the so-called cultivated world with the greatest sympathy. In this connection, one thing is worthy of note: that out of the works of Comte, consisting of two parts, of positive philosophy and of positive politics, only the first was adopted by the learned world,--that part which justifieth, on new promises, the existent evil of human societies; but the second part, treating of the moral obligations of altruism, arising from the recognition of mankind as an organism, was regarded as not only of no importance, but as trivial and unscientific. It was a repetition of the same thing that had happened in the case of Kant's works. The "Critique of Pure Reason" was adopted by the scientific crowd; but the "Critique of Applied Reason," that part which contains the gist of moral doctrine, was repudiated. In Kant's doctrine, that was accepted as scientific which subserved the existent evil. But the positive philosophy, which was accepted by the crowd, was founded on an arbitrary and erroneous basis, was in itself too unfounded, and therefore unsteady, and could not support itself alone. And so, amid all the multitude of the idle plays of thought of the men professing the so-called science, there presents itself an assertion equally devoid of novelty, and equally arbitrary and erroneous, to the effect that living beings, i.e., organisms, have had their rise in each other,--not only one organism from another, but one from many; i.e., that in a very long interval of time (in a million of years, for instance), not only could a duck and a fish proceed from one ancestor, but that one animal might result from a whole hive of bees. And this arbitrary and erroneous assumption was accepted by the learned world with still greater and more universal sympathy. This assumption was arbitrary, because no one has ever seen how one organism is made from another, and therefore the hypothesis as to the origin of species will always remain an hypothesis, and not an experimental fact. And this hypothesis was also erroneous, because the decision of the question as to the origin of species--that they have originated, in consequence of the law of heredity and fitness, in the course of an interminably long time--is no solution at all, but merely a re-statement of the problem in a new form.