An Introduction to the Study of Social Evolution: The Prehistoric PeriodCentury, 1913 - 306 من الصفحات |
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الصفحة 20
... - verse circumstances , tends to increase the number of in- dividuals in any given species in geometrical ratio . This means that in every generation of every species a great many more individuals are born than can possibly sur- vive 20.
... - verse circumstances , tends to increase the number of in- dividuals in any given species in geometrical ratio . This means that in every generation of every species a great many more individuals are born than can possibly sur- vive 20.
الصفحة 21
The Prehistoric Period Francis Stuart Chapin. many more individuals are born than can possibly sur- vive . The result is that those born with certain weak- nesses or under unfavorable conditions are the ones which are most likely to die ...
The Prehistoric Period Francis Stuart Chapin. many more individuals are born than can possibly sur- vive . The result is that those born with certain weak- nesses or under unfavorable conditions are the ones which are most likely to die ...
الصفحة 22
... individuals in the species up to the usual mark . For every starfish living nearly half a million die each year . Indeed , taking organic nature as a whole probably not one in a thousand young is allowed to survive to the age of ...
... individuals in the species up to the usual mark . For every starfish living nearly half a million die each year . Indeed , taking organic nature as a whole probably not one in a thousand young is allowed to survive to the age of ...
الصفحة 24
... individuals are born than can survive , there is a perpetual battle for life go- ing on among all the ... individual who does sur- vive in the battle for existence is on the whole the one best fitted to do so . If now , in ...
... individuals are born than can survive , there is a perpetual battle for life go- ing on among all the ... individual who does sur- vive in the battle for existence is on the whole the one best fitted to do so . If now , in ...
الصفحة 25
... individuals to breed from , slowly but continuously improve their stock , so Nature by a process of " selec- tion ... individual variation . The indi- vidual differences are due to age , sex , modification , and 6 Thomson & Geddes ...
... individuals to breed from , slowly but continuously improve their stock , so Nature by a process of " selec- tion ... individual variation . The indi- vidual differences are due to age , sex , modification , and 6 Thomson & Geddes ...
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عبارات ومصطلحات مألوفة
ancestors ancient animals apes Asia associated Aurignacian Baltic become blond Boas body bone Brehon laws cave ceremonies character characteristics civilization clan color coöperation culture custom Darwin descent dolichocephalic environment Epoch evolution existence exogamous favorable FIGURE folkways food supply germ cells Giddings glacial growth habit hair heredity human Ibid ideas imitation implements important Indian individual influence inherited Iroquois Keane kindred living long-headed Lower Paleolithic Magdalenian magic marriage Mendelian Inheritance Mensch in Europa mental metronymic Mind of Primitive Mousterian natural selection Neanderthal Neolithic offspring origin Paleolithic parents period phratries population possess prehistoric produce Professor Races of Europe racial regard regions relations Ripley savage skull slave society Sociology species spirit stage stature stone age struggle surplus survive tain tends theory tion Tlingit totem tradition tribal tribes ture Tylor Upper Paleolithic usages variation White race
مقاطع مشهورة
الصفحة 183 - The mores come down to us from the past. Each individual is born into them as he is born into the atmosphere, and he does not reflect on them, or criticise them any more than a baby analyzes the atmosphere before he begins to breathe it.
الصفحة 117 - The great difficulty which history records is not that of the first step, but that of the second step. What is most evident is, not the difficulty of getting a fixed law, but getting out of a fixed law ; not of cementing...
الصفحة 118 - ... is among the first by which Providence guides and governs the world, there is a tendency in descendants to be like their progenitors, and yet a tendency also in descendants to differ from their progenitors. The work of Nature in making generations is a patchwork — part resemblance, part contrast. In certain respects each born generation is not like the last born ; and in certain other respects it is like the last. But the peculiarity of arrested civilization is to kill out varieties at birth...
الصفحة 189 - Of course, the proposition is not necessarily communicated in formal language, it may be implied by a mere gesture or interjection. The suggestibility of any subject is not of the same degree at all times ; it varies not only according to the topic and according to the source from which the proposition is communicated, but also with the condition of the subject's brain from hour to hour. The least degree of suggestibility...
الصفحة 113 - A word is a vehicle, a boat floating down from the past, laden with the thought of men we never saw; and in coming to understand it we enter not only into the minds of our contemporaries, but into the general mind of humanity continuous through time.
الصفحة 5 - I have attempted to explain heredity by supposing that in each ontogeny, a part of the specific germ-plasm contained in the parent egg-cell is not used up in the construction of the body of the offspring, but is reserved unchanged for the formation of the germ-cells of the following generation.
الصفحة 196 - There is an undoubted tendency in the advance of civilization to eliminate traditional elements, and to gain a clearer and clearer insight into the hypothetical basis of our reasoning. It is therefore not surprising that, with the advance of civilization, reasoning becomes more and more logical, not because each individual carries out his thought in a more logical manner, but because the traditional material which is handed down to each individual has been thought out and worked out more thoroughly...
الصفحة 122 - Man has been so noisy about the way he has "conquered Nature," and Nature has been so silent in her persistent influence over man, that the geographic factor in the equation of human development has been overlooked.
الصفحة 5 - Regarded from this point of view, life is like a current passing from germ to germ through the medium of a developed organism. It is as if the organism itself were only an excrescence, a bud caused to sprout by the former germ endeavoring to continue itself in a new germ.
الصفحة 129 - The head form, which has always been considered as one of the most stable and permanent characteristics of human races, undergoes far-reaching changes due to the transfer of the races of Europe to American soil. The east European Hebrew, who has a very round head, becomes more long-headed; the south Italian, who in Italy has an exceedingly long head, becomes more short-headed ; so that both approach, a uniform type in this country, so far as the roundness of the head is concerned.