This is a dynamic theory that involves mechanisms and causal relationshipsit deals with the process of evolution. Darwins interest in natural history developed at the college level, while studying first medicine, then theology. But it was his five year voyage on the HMS Beagle that began his road to eminence. His biological observations at that time led him to study transmutation of species and develop his theory of natural selection in 1. He confided only in close friends, but in 1. Alfred Russel Wallace now had a similar theory forced early joint presentation of the theory. Darwins 1. 85. 9 book, The Origin of Species by Means of Natural Selection, or The Preservation of Favoured Races in the Struggle for Life usually abbreviated to The Origin of Species, established evolution by common descent as the dominant scientific theory of diversification in nature, and it established natural selection as a contender for explaining the diversity of life. He was made a Fellow of the Royal Society, continued his research, and wrote a series of books on plants and animals, including humans in The Descent of Man and Selection in Relation to Sex and The Expression of the Emotions in Man and Animals. His last book was about earthworms. In recognition of Darwins pre eminence, he is buried in Westminster Abbey, close to Sir William Herschel and Sir Isaac Newton. Darwins theory of descent with modification, which is neutral with respect to the process involved, was accepted soon after its introduction, and substantial evidence has been accumulated in its support. In contrast, Darwins theory of modification through natural selection was, at its core, revolutionary and controversial, positing a process that went against prevailing concepts at the time. See radical components. It was not well accepted by the scientific community until the middle of the twentieth century. Furthermore, the theory that natural selection serves as the main directive force of large scale evolutionary changes and new designs macroevolution remains controversial in various quarters today, and its evidences remain largely confined to extrapolations from evolution observed within species or populations microevolution. Darwin has been claimed as a patron saint of materialists who identify the mechanism of natural selection operating on variability as a great nail in the coffin of God and all related matters of spirit and religion. The proven efficacy of natural selection, they claim, is ample justification for disposing of any idea that a deity may have had even a small role in creating either new species, marvelous mechanisms such as the human eye, or human beings. Yet, at the same time, such views are a great affront to many religious people who have viewed the marvels of the natural world as the handiwork of a Creator God. Many religious people hold the view that the directing or creative force in the observed pattern of evolution is a Creator or God and that although natural selection may be a force for change within a species or population, it cannot be the ultimate source of major new designs or the remarkable diversity of species. However, there actually is a great diversity of religious belief regarding Darwins theories, from those that stand in opposition to both the theory of descent with modification and the theory of natural selection such as young earth creationists, to those that accept the pattern observed in nature theory of descent with modification but not the process theory of natural selection, and still others who accept natural selection as the causal agent of large scale change. Darwins ideas and impact. Synopsis of Darwins ideas. Charles Darwin in 1. The Origin of Species. There are two major components in Darwins theory of evolution 1 the theory of descent with modification and 2 the theory of modification through natural selection. The theory of descent with modification or theory of evolution by common descent essentially postulates that all organisms have descended from common ancestors by a continuous process of branching. In other words, all life evolved from one kind of organism or from a few simple kinds, and each species arose in a single geographic location, from another species that preceded it in time. Optimal A1 Intensivtrainer Pdf. Evolutionists have marshaled substantial evidence for the theory of descent with modification. That is, the pattern of evolution is documented by the fossil record, the distribution patterns of existing species, methods of dating fossils, and comparison of homologous structures, among others. The second theory of Darwin, the theory of modification through natural selection or, simply, theory of natural selection, holds that natural selection is the directing or creative force of evolution. It recognizes that individuals in a population are not all the same there are variations, some of these variations are heritable, all organisms produce more offspring than can survive, and those surviving to reproduce have the best fit to the environment, such that favorable traits will accumulate and unfavorable traits will decline and be lostperhaps to the extent that a new species will be formed. Note that natural selection is considered far more than just a minor force for weeding out unfit organisms. Even Paley and other natural theologians accepted natural selection, albeit as a devise for removing unfit organisms, rather than as a directive force for creating new species and new designs. Concrete evidence for the theory of modification by natural selection is limited to microevolution, such as seen in the case of artificial selection whereby various breeds of animals and varieties of plants have been produced that are different in some respect from their ancestors, or in natural selection within populations or species such as the often cited, but somewhat problematic case of systematic color change in the peppered moth, Biston betularia. The evidence that natural selection directs the major transitions between species and originates new designs macroevolution necessarily involves extrapolation from these evidences on the microevolutionary level. One of Darwins chief purposes in publishing the Origin of Species was to show that natural selection had been the chief agent of the change presented in the theory of descent with modification. The validity of making this extrapolation has recently come under strong challenge from top evolutionists. In Darwins comprehensive theory of evolution, there can actually be elucidated at least three additional, major, largely independent theories 1 evolution as fact 2 populational speciation and 3 gradualism. Darwin strived to establish the fact of evolution, countering the view of most people and scientists at the time that the world was constant. Darwin also looked at speciation as a populational phenomenon the population gradually changed until it became a new species. Thirdly, Darwin also insisted that evolution was entirely gradual, that evolution proceeded by means of the slow, steady accumulation of slight favorable variations.