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accumulation action actually already animals appeared attempt become biology called cause character comparative complex conception conduct conscience considered constitution course Darwin deductive demonstration determine doctrine domestic ethics evidence evolution evolutionary existence explain fact fittest follow forms geometry given gives ground habit hand hold human idea imagination individual inquire instinct intelligence known less logic lower man's mankind marriage mathematics matter means mechanism merely method mind modifications moral moralist natural selection object observation organic origin origin of species pass phenomena philosophy physical plants possible practice present preserved primitive principles problem produce purely question reason recognized reflection regard relations remains result rules scientific seems selective breeding sense social species speculation stage struggle supposed theory things thought tion tribes true ultimate universal variations vary virtue whole
Página 197 - Hail wedded love, mysterious law, true source Of human offspring, sole propriety In Paradise of all things common else. By thee adulterous lust was driven from men Among the bestial herds to range, by thee Founded in reason, loyal, just, and pure, Relations dear, and all the charities Of father, son, and brother first were known.
Página 76 - On the other hand, we may feel sure that any variation in the least degree injurious would be rigidly destroyed. This preservation of favorable individual differences and variations, and the destruction of those which are injurious, I have called Natural Selection, or the Survival of the Fittest...
Página 79 - I may be allowed to personify the natural preservation or survival of the fittest, cares nothing for appearances, except in so far as they are useful to any being. She can act on every internal organ, on every shade of constitutional difference, on the whole machinery of life. Man selects only for his own good : Nature only for that of the being which she tends.
Página 55 - Thus, whatever system of organs be studied, the comparison of their modifications in the ape series leads to one and the same result — that the structural differences which separate Man from the Gorilla and the Chimpanzee are not so great as those which separate the Gorilla from the lower apes.
Página 107 - ... any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected. From the strong principle of inheritance, any selected variety will tend to propagate its new and modified form.
Página xvi - I suppose, if duly considered and pursued, afford such foundations of our duty and rules of action as might place morality amongst the sciences capable of demonstration: wherein I doubt not but from self-evident propositions, by necessary consequences as incontestable as those in mathematics, the measures of right and wrong might be made out to anyone that will apply himself with the same indifferency and attention to the one as he does to the other of these sciences.
Página 206 - Therefore, looking far enough back in the stream of time, and judging from the social habits of man as he now exists, the most probable view is that he aboriginally lived in small communities, each with a single wife, or, if powerful, with several, whom he jealously guarded against all other men.
Página 54 - Therefore, on the principle of natural selection with divergence of character, it does not seem incredible that, from some such low and intermediate form, both animals and plants may have been developed; and, if we admit this, we must likewise admit that all the organic beings which have ever lived on this earth may be descended from some one primordial form.
Página 45 - ... that which enables the agriculturist not only to modify the character of his flock, but to change it altogether. It is the magician's wand, by means of which he may summon into life whatever form and mould he pleases.
Página 50 - Hence, as more individuals are produced than can possibly survive, there must in every case be a struggle for existence — either one individual with another of the same species, or with the individuals of distinct species, or with the physical conditions of life.