vican barrier

He gives due honor to Frank & George7 I should like to keep it a few days to read your life. When this monument has been erected to Dr. D you should set about erecting your own in the shape of a really handsome Edition of the Origin that a gentleman could read8 EAD

essentially Darwin would never have been a neo-darwinian

Chapter 39 of Zoonomia, “On Generation,” presents Erasmus’ ideas on competition, extinction, and how “different fibrils or molecules are detached from…the parent…to form” the child. The Temple of Nature goes even farther, declaring “all vegetables and animals now existing were originally derived from the smallest microscopic ones, formed by spontaneous vitality” in ancient oceans.

Erasmus Darwin’s popularity in America was so great that over a hundred children in Massachusetts between 1800 and 1850 were apparently named after him. I was so surprised to discover a half dozen of them in the remote hill-town of Ashfield where I had gone to find Dr. Charles Knowlton that I did a whole project trying to track them down.

system was described by Charles Darwin:I keep from thirty to forty large portfolios, in cabinets with labeled shelves, intowhich I can at once put a detached reference or memorandum. I have bought manybooks and at their ends I make an index of all the facts that concern my work.Before beginning on any subject I look to all the short indexes and make a generaland classified index, and by taking the one or more proper portfolios I have all theinformation collected during my life ready for use.13

his original French

He was kind enough to inform me that, for his notes, he had himself employed exactly the same process of loose slips that my father and I have followed, and which I have spoken of in detail in my Phytographie

In other words, in modern note-making parlance, Darwin: gathered loose slips of information in a number of different filed folders dedicated to particular topics of interest. These slips included notes, speculations and draft fragments of his own; interesting snippets from, and comments on, stuff he had read; and extracts from personal correspondence; made brief source/literature notes which he filed either: a) in the back of the book concerned; or b) in a dedicated file (i.e. drawer). Note: As we shall see from his son Francis’s account of Darwin’s note-taking system, Darwin sometimes also filed particular source/literature notes in the appropriate topic-related folder(s).

Whewell was one of the Cambridge dons whom Charles Darwin met during his education there, and when Darwin returned from the Beagle voyage he was directly influenced by Whewell, who persuaded Darwin to become secretary of the Geological Society of London. The title pages of On the Origin of Species open with a quotation from Whewell's Bridgewater Treatise about science founded on a natural theology of a creator establishing laws:[33] But with regard to the material world, we can at least go so far as this—we can perceive that events are brought about not by insulated interpositions of Divine power, exerted in each particular case, but by the establishment of general laws.

Darwin knew nothing of genes. He was unaware of the work of Gregor Mendel, the Austrian monk who worked in his monastery garden and did experiments on the inheritance of pod-color in peas. Mendel discovered that heritable traits such as pod-color are inherited in discrete packages which he called genes. Any act of sexual reproduction of two parents with different genes results in offspring with a random distribution of the parental genes. Heredity in any population is a random process, resulting in a redistribution of genes between parents and offspring. The numbers of genes of various types are maintained on the average from generation to generation, but the numbers in each individual offspring are random. Mendel made this discovery and published it in the journal of the Brünn Natural History Society, only seven years after Darwin published The Origin of Species. Mendel had read Darwin's book, but Darwin never read Mendel's paper. In 1866, the year when Mendel's paper was published, Darwin did a very similar experiment, using snap-dragons instead of peas, and testing the inheritance of flower-shape instead of pod-color. Like Mendel, he bred three generations of plants, and observed the ratio of normal-shaped to star-shaped flowers in the third generation. Unlike Mendel, he had no understanding of the mathematics of statistical variations. He used only 125 third-generation plants and obtained a value of 2.4 for the ratio of normal to star-shaped offspring. This result did not suggest any clear picture of the way flower-shapes are inherited. He stopped the experiment and explored the question no further. Darwin did not understand that he would need a much larger sample to obtain a statistically significant result. Mendel understood statistics. His sample was sixty-four times larger than Darwin's, so that his statistical uncertainty was eight times smaller. He used 8023 plants. Mendel's essential insight was to see that sexual reproduction is a system for introducing randomness into inheritance. In peas as in humans, inheritance is carried by genes that are handed down from parents to offspring. His simple theory of inheritance carried by genes predicted a ratio of three between green and yellow pods in the third generation. He found a ratio of 3.01 with the big sample. This gave him confidence that the theory was correct. His experiment required immense patience, continuing for eight years with meticulous attention to detail. Every plant was carefully isolated to prevent any intruding bee from causing an unintended fertilization. A monastery garden was an ideal place for such experiments. Unfortunately, his experiments ended when his monastic order promoted him to the rank of abbot. Obedient to his vows, he ceased to be an explorer and became an administrator. His life-work lay hidden in an obscure German-language journal in Brünn, the city that later became Brno and is now in the Czech Republic.

Like many people, I’d always been baffled by the occasional, undeniably ‘Lamarckian’ passages in On the Origin of Species, bearing in mind Darwin is generally credited with having discredited such thinking.

An alternative school of Darwinism emerged in Russia emphasizing cooperation, not competition, as the driver of evolutionary change. In 1902 this approach found a voice in a popular book, Mutual Aid: A Factor of Evolution, by naturalist and revolutionary anarchist pamphleteer Peter Kropotkin.

Spencer, in turn, was struck by how much the forces driving natural selection in On the Origin of Species jibed with his own laissez-faire economic theories. Competition over resources, rational calculation of advantage, and the gradual extinction of the weak were taken to be the prime directives of the universe.

he concept of cultural evolution began with the father of evolution himself, Waring said. Charles Darwin understood that behaviors could evolve and be passed to offspring just as physical traits are

The only diagram or image in The Origin of Species, a tree depicting divergence (source)

he was working on the same theme with Stefanie Posavec. They completed their piece some time later, depicting the changes as lovely branching trees — a kind of homage to Darwin’s lone diagram in the book.

Fifty years ago, coinciding with the centennial of the release of Darwin’s manuscript, author Morse Peckham collected all six editions into a single “variorum” text. Peckham painstakingly created a reference system that denotes the modifications and changes between editions. The text was created by Peckham’s careful enumeration of every sentence from every edition, copied onto index cards; from these cards, he carefully assembled them into a final text.

the phrase “survival of the fittest” — usually considered central to the theory and often attributed to Darwin — instead came from British philosopher Herbert Spencer, and didn't appear until the fifth edition of the text.

New DNA technology is shaking up the family trees of many plants and animals.

Toward the end of the 18th century English publisher John Bell published notebooks entitled Bell’s Common-Place Book, Formed generally upon the Principles Recommended and Practised by Mr Locke.” These included eight pages of instructions on Locke’s indexing method, a system which not only made it easier to find passages, but also served the higher purpose of “facilitat[ing] reflexive thought.”

“I had [...]during many years followed a golden rule, namely, that whenever apublished fact, a new observation or thought came across me, whichwas opposed to my general results, to make a memorandum of itwithout fail and at once; for I had found by experience that such factsand thoughts were far more apt to escape from the memory thanfavorable ones. Owing to this habit, very few objections were raisedagainst my views, which I had not at least noticed and attempted toanswer.” (Darwin 1958, 123)

Charles Darwin wrote an entire book about humans being social creatures. He wrote that any Hobbesian human would be an “unnatural monster.”

For if I wait out the uncomfortable night by the river,I fear that the female dew and the evil frost togetherwill be too much for my damaged strength, I am so exhausted, and in themorning a chilly wind will blow from the river; 470 but if I go up the slopeand into the shadowy forest,and lie down to sleep among the dense bushes, even if the chill andweariness let me be, and a sweet sleep comes upon me,I fear I may become spoil and prey to the wild animals.’

Teilhard consistentlyargued that,“the main movement in the universe has been, and is, a groping towards consciousness.”262Evolution, in hisview, exhibits a tendency towards increasing complexity and “cerebralisation.”263To date, this process has resulted in the emergence of humans, highly complex creatures thathave in turn given rise to a new “‘thinking layer,’” or noosphere—the complex web of collective thought and technologies that have dramatically extended humanity’s reach within the biosphere.264

I had heard of some discoveries having been made by an English philosopher

Dr. Darwin

« Si tu te regardes trop longtemps dans la glace, tu y verras un singe. » J’ai dû me regarder encore plus longtemps : ce que je vois est bien au-dessous du singe, à la lisière du monde végétal, au niveau des polypes.

Finches

marine iguanas, the only lizard that scours the ocean for food.

island of Santiago

3 results for charles darwin

Species described by Charles Darwin

Galapagos Species Checklist

The Galápagos are an archipelago of 20 islands, originally called the Enchanted Islands, and made famous by Charles Darwin, who visited the islands in 1835, later formulating his theory of evolution based on his trip.

How inexplicable are these facts on the ordinary view of creation! Why should the brain be enclosed in a box composed of such numerous and such extraordinarily shaped pieces of bone? As Owen has remarked, the benefit derived from the yielding of the separate pieces in the act of parturition of mammals, will by no means explain the same construction in the skulls of birds. Why should similar bones have been created in the formation of the wing and leg of a bat, used as they are for such totally different purposes? Why should one crustacean, which has an extremely complex mouth formed of many parts, consequently always have fewer legs; or conversely, those with many legs have simpler mouths? Why should the sepals, petals, stamens, and pistils in any individual flower, though fitted for such widely different purposes, be all constructed on the same pattern ?

If it could be proved that the Hottentot had descended from the Negro, I think he would be classed under the Negro group, however much he might differ in colour and other important characters from negroes.

Finally, with respect to the comparative value of the various groups of species, such as orders, sub-orders, families, sub-families, and genera, they seem to be, at least at present, almost arbitrary. Several of the best botanists, such as Mr Bentham and others, have strongly insisted on their arbitrary value. Instances could be given amongst plants and insects, of a group of forms, first ranked by practised naturalists as only a genus, and then raised to the rank of a sub-family or family; and this has been done, not because further research has detected important structural differences, at first overlooked, but because numerous allied species, with slightly different grades of difference, have been subsequently discovered.

We might try our lives by a thousand simple tests; as, for instance, that the same sun which ripens my beans illumines at once a system of earths like ours. If I had remembered this it would have prevented some mistakes. This was not the light in which I hoed them. The stars are the apexes of what wonderful triangles! What distant and different beings in the various mansions of the universe are contemplating the same one at the same moment! Nature and human life are as various as our several constitutions. Who shall say what prospect life offers to another? Could a greater miracle take place than for us to look through each other's eyes for an instant? We should live in all the ages of the world in an hour; ay, in all the worlds of the ages. History, Poetry, Mythology!—I know of no reading of another's experience so startling and informing as this would be. The greater part of what my neighbors call good I believe in my soul to be bad, and if I repent of anything, it is very likely to be my good behavior. What demon possessed me that I behaved so well? You may say the wisest thing you can, old man—you who have lived seventy years, not without honor of a kind—I hear an irresistible voice which invites me away from all that. One generation abandons the enterprises of another like stranded vessels.

which is the means by which weaker, less robust individuals preserve them-selves-since they have been denied the chance to wage the battle for existence with horns or with the sharp teeth of beasts of prey.

This conclusion is not founded on this single instance, but on this instance compared with a general experience of the regularity of this clement in all its operations.

whereas nature herself intimates that it is just for the better to have more than the worse, the more powerful than the weaker; and in many ways she shows, among men as well as among animals, and indeed among whole cities and races, that justice consists in the superior ruling over and having more than the inferior.

struggle is what all life essentially consists of,and the evolution of civilization may therefore be simply described as the struggle for life of the humanspecies.

preservation of the species