less certainty the further from us any animal is in its organization. A comparison such as Spencer institutes is possible only with respect to like functions of similar organs in closely related forms. The assertion that increase of ability for self-preservation leads to better care for the young, and makes of such care a duty, is likewise erroneous. For, up to the highly organized class of the crustacea, we have no example of care for the young. In the struggle for existence, the species which survive must be such as not only are in themselves best fitted for survival, but as also bring forth best fitted progeny. Nor has Spencer made clear on what ground natural process is to be regarded as identical with duty. In truth he has succeeded in showing only that care for the young is wide-spread in the animal kingdom, from which fact naturally follows that it is a quality which tends to the preservation of species. It cannot be conceded that such a perfection as Spencer pictures, where each shall fulfil all the functions of his own life in the most perfect and complete manner without interfering with a like freedom in others, is possible. The assertion involves the extension to all living beings of that ideal principle of equal claims which Spencer repudiates with regard to man,--showing that not all men are capable of a like degree of happiness and that individuals desire, moreover, pleasure differing in quality. Furthermore, a world of beings which, like the animals and many plants, can support life only by means of organic material, must, in order to exist, destroy organic life, either animal or vegetable. The theory does not even hold with regard to individuals of the same species; Spencer himself acknowledges the truth of the principles of Malthus and of Darwin, according to which, even with the lowest rate of increase, a struggle of competition must soon arise between individuals of the same species. Nor does Spencer's proof of the fundamental character of altruism hold, on investigation. He demonstrates that through the animal species up to man, there is less and less self-sacrifice of the mother animal in giving birth to offspring. But this physical sacrifice is not altruism; altruism lies in conscious care for the young after birth, and this is not lessened, but increased, the higher we ascend.