scholarly journals Charles Darwin, an evolutionary scientist

2019 ◽  
Vol 25 ◽  
pp. 344-347
Author(s):  
H. B. Humeniuk ◽  
I. B. Chen ◽  
O. S. Voloshyn
Keyword(s):  
Natural Selection ◽  
Driving Force ◽  
Charles Darwin ◽  
Synthetic Theory ◽  
Theory Of Evolution ◽  
Evolutionary Thought ◽  
Living Organisms ◽  
Over Time ◽  
Common Ancestors

Charles Robert Darwin is an English naturalist, geologist and biologist. He was one of the first to realize and clearly demonstrated that all living organisms evolved over time from common ancestors. The main driving force of evolution was called natural selection and uncertain variability. The existence of evolution was recognized by most scientists during the life of Charles Darwin, while his theory of natural selection, as the main explanation of evolution, became universally recognized only in the 30’s of the XX century. The ideas and discoveries of Charles Darwin, in a revised form, form the foundation of a modern synthetic theory of evolution and form the basis of biology, providing a logical explanation for biodiversity. Orthodox followers of Darwin’s teachings develop the direction of the evolutionary thought bearing his name Darwinism. Keywords: evolution, natural selection, uncertain variability, theory, biodiversity.

Adaptation

2001 ◽  
Author(s):  
David Reznick ◽  
Joseph Travis
Keyword(s):  
Natural Selection ◽  
Charles Darwin ◽  
Theory Of Evolution ◽  
Cause And Effect ◽  
Evolution By Natural Selection ◽  
Definition Of ◽  
Life On Earth ◽  
Diversity Of Life ◽  
First Time ◽  
Over Time

When Charles Darwin and Alfred Russell Wallace proposed their theory of evolution by natural selection, the concepts of evolution and speciation were not new. Darwin introduced The Origin with “An Historical Sketch,” in which he summarized the work of 34 previous authors who had speculated on evolution and the origin of species. What was new about Darwin and Wallace’s proposition was natural selection as the mechanism of evolutionary change. Darwin further proposed that natural selection was a unifying process that accounts for adaptation, for speciation, and hence for the diversity of life on earth. Darwin and Wallace proposed natural selection as a process that caused evolution. Adaptations are features of organisms that were shaped by this process. The modern version of Darwin and Wallace’s theory allows for other agents of evolution, such as genetic drift, migration, and mutation, but adaptation remains a product of natural selection alone. The virtue of their proposal is that it allows us to develop testable hypotheses about cause-and-effect relationships between features of the environment and presumed adaptations. Natural selection immediately became a source of controversy, although the nature of the controversy has shifted over time. First, there has been considerable debate about the definition of adaptation (e.g., Reeve and Sherman 1993). We do not wish to add to or summarize this debate because we feel that Darwin got it right the first time. Besides defining a cause-and-effect relationship between selection and adaptation, Darwin emphasized that we should not expect organisms to be perfectly adapted to their environment. In fact, this emphasis was a large component of his argument against divine creation. For example, Darwin recognized, through his experience with artificial selection, that different aspects of morphology were in some way “tied” to one another so that selection on one trait would cause correlated changes in others that were not necessarily adaptive. He also recognized that organisms were subject to constraints that might limit their ability to adapt. Finally, he argued that how organisms evolved was a function of their history, so that the response to selection on the same trait would vary among lineages. A more telling criticism considers the application of cause-and-effect reasoning to the interpretation of features of organisms as adaptations, and hence to the empirical study of adaptation.

scholarly journals Paleontology as a component of development of synthetic theory of evolution

2016 ◽  
Vol 6 (8) ◽  
pp. 108-123
Author(s):  
H. Deforzh
Keyword(s):  
Natural Selection ◽  
Natural History ◽  
Charles Darwin ◽  
Life Sciences ◽  
Radical Change ◽  
Synthetic Theory ◽  
Young Colleague ◽  
Theory Of Evolution ◽  
Charles Lyell ◽  
The Earth

The idea of evolution in natural history, which formed the basis for radical change not only in science but also in the thinking of modern humanity, was formulated and perceived in its integrity and perspective only in the ХІХ century. In the Earth sciences, this idea was first presented by the prominent English geologist Charles Lyell (1797-1875) in 1830-1833, and in the life sciences evolutionism won after the 1859 publication of the book by a young colleague and student of Ch. Lyell - Charles Darwin (1809-1882) - «On the Origin of Species by Means of Natural Selection».

Introduction to Life

2019 ◽  
pp. 1-18
Keyword(s):  
Natural Selection ◽  
Charles Darwin ◽  
Theory Of Evolution ◽  
Carl Linnaeus ◽  
Research Problems ◽  
Living Organisms ◽  
Philosophical Questions ◽  
Practice Of Science ◽  
Scientific Name

This chapter introduces what life is and what characterises it, discusses its diversity, then introduces the theory of evolution. It ends with a section discussing how scientists investigate research problems called the “Process of Science.” Living organisms share very defined characteristics—the sum of which make the “wholeness” we call life. Carl Linnaeus proposed a binomial system of classification where each organism's scientific name has two distinct parts: the genus and the species. Charles Darwin formulated the theory of natural selection which explains how evolution works. Humans share a lot in common with other living organisms, but there are features that make us distinctly human not shared with any other living organisms. The practice of science uses a carefully formulated series of steps in investigating problems. Science cannot explain everything especially philosophical questions that involve issues of right and wrong.

2. Evolution and natural selection

2019 ◽  
pp. 9-26
Author(s):  
Samir Okasha
Keyword(s):  
Natural Selection ◽  
Charles Darwin ◽  
Natural World ◽  
Early 20Th Century ◽  
Philosophical Argument ◽  
Modern Biology ◽  
Theory Of Evolution ◽  
Philosophical Significance ◽  
Argument From Design ◽  
Evolution By Natural Selection

In 1859 Charles Darwin published On the Origin of Species, in which he set out his theory of evolution. The book marked a turning point in our understanding of the natural world and revolutionized biology. ‘Evolution and natural selection’ outlines the theory of evolution by natural selection, explaining its unique status in biology and its philosophical significance. It considers how Darwin’s theory undermined the ‘argument from design’, a traditional philosophical argument for the existence of God; how the integration of Darwin’s theory with genetics, in the early 20th century, gave rise to neo-Darwinism; and why, despite evolutionary theory being a mainstay of modern biology, in society at large there is a marked reluctance to believe in evolution.

Darwinism

2014 ◽  
Author(s):  
Michael Ruse
Keyword(s):  
Natural Selection ◽  
Land Tenure ◽  
Charles Darwin ◽  
General Term ◽  
Evolutionary Change ◽  
Social Darwinism ◽  
Theory Of Evolution ◽  
Mendelian Genetics ◽  
Thomas Henry Huxley ◽  
Foundational Work

The modern usage of the term Darwinism dates from the publication of On the Origin of Species, by Charles Darwin, in which he argued for evolution through natural selection. Very soon after the appearance of the Origin (in 1859), Darwin’s great supporter Thomas Henry Huxley introduced the term Darwinism. The term—together with the related terms Darwinian and Darwinist—took root. The codiscoverer of natural selection, Alfred Russel Wallace, used the term as the title of a book expounding evolution: Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its Applications. Note that there seems to be a fuzziness about the term. Some identify Darwinism with evolution through natural selection. Others suggest that the essence of Darwinism is not selection per se but change or variation. Late in the 19th century, George Romanes coined the term neo-Darwinism to cover those for whom natural selection is basically the only significant cause of change. In 1930 Ronald A. Fisher, in his Genetical Theory of Natural Selection, argued that the newly developed theory of Mendelian genetics offered the required foundation for a perspective that made natural selection the central force of evolutionary change. Although the British were happy to call the Darwin-Mendel synthesis neo-Darwinism, in America the synthesis was known as the synthetic theory of evolution. This reflects that in the New World it was Sewall Wright who did the foundational work in bringing Mendelian genetics into the evolutionary picture and that he never thought of natural selection as being the force that Fisher took it to be. For Wright and his followers, especially Theodosius Dobzhansky, genetic drift was always a major component of the evolutionary picture, and as Fisher pointed out nonstop, this is about as non-Darwinian a notion as it is possible to have. By 1959 professional evolutionists (on both sides of the Atlantic) agreed that Darwin had been right about natural selection: it is the major cause of evolutionary change. Neo-Darwinism fell into disuse, as everyone now used the term Darwinism for evolution through natural selection. Mention should also be made of so-called social Darwinism, the application of Darwinism to persons and groups within society. The earliest use apparently was during Darwin’s own lifetime, by a historian discussing land tenure in Ireland. However, it was not a popular or general term, coming into widespread use only in the 1940s, with the publication of the American historian Richard Hofstadter’s book Social Darwinism in American Thought.

Joseph Dalton Hooker, F. R. S. (1817-1911)

1959 ◽  
Vol 14 (1) ◽  
pp. 109-120
Keyword(s):  
Natural Selection ◽  
Major Part ◽  
Charles Darwin ◽  
Plant Taxonomy ◽  
Theory Of Evolution ◽  
General Acceptance ◽  
Long Period ◽  
Varying Length ◽  
Joseph Dalton Hooker ◽  
Living Material

Joseph Dalton Hooker was eight years the junior of Charles Darwin (1809-82) and lived twenty-nine years after Darwin’s death. He was, for a long period, the personal friend of Darwin and the frank critic of many of Darwin’s researches and of the botanical aspects of Darwinian theories. Hooker was a botanist and, since he had an extensive first-hand experience of many branches of botany, above all of plant taxonomy and phytogeography, it was naturally the botanical aspects of evolutionary problems which both interested him and concerning which he was best able to help Darwin. Such help was gratefully and fully acknowledged by Darwin, as is shown by published correspondence. Numerous letters passed between Darwin and Hooker and the latter visited his friend at Down and stayed there for periods of varying length. A considerable amount of living material was obviously supplied from Kew for the later botanical experiments Darwin carried out at Down. The assistance given by Hooker in the accumulation of facts and in criticism of theories preparatory to the publication of the Origin of species and later works of Darwin, his presenting (with Lyell) and reading Darwin’s communication to the Linnean Society of London on 1 July 1858 introducing the theory of natural selection, and his influence in gaining the speedy general acceptance of the theory of evolution are well known and it is not necessary to consider them here in much detail. It is proposed, instead, to outline very briefly the salient facts in the life of J.D. Hooker and then to devote the major part of this essay to a consideration of the development of his views on the problems of species, phytogeography, and evolution. In part at least, this means considering the influence of Darwin on Hooker but, from a wider viewpoint, it is possible to form some conception of the clarifying and unifying effects of the acceptance of the general theory of evolution on biological thought.

scholarly journals Darwin's Use of Intellectual Disability in The Descent of Man

2008 ◽  
Vol 28 (2) ◽  
Author(s):  
Steven A. Gelb
Keyword(s):  
Intellectual Disability ◽  
Natural Selection ◽  
Intellectual Disabilities ◽  
Human Evolution ◽  
Mental State ◽  
Charles Darwin ◽  
Human Beings ◽  
Theory Of Evolution ◽  
Descent Of Man

When Charles Darwin turned his attention to writing about human descent in 1871 he attempted to narrow the fossil gap between human beings and higher primates by presenting persons with intellectual disabilities — "idiots" in the language of the day — as evidence in support of the theory of evolution. This paper explores the four ways that Darwin used persons with intellectual disabilities in The Descent of Man: 1) as intermediate rung on the evolutionary ladder connecting humans and primates; 2) as exemplars of the inevitable waste and loss produced by natural selection acting upon variability; 3) as the floor of a scale representing the "lowest", most unfit variety of any species when individuals were rank ordered by intelligence; and 4) as atavistic reversions to extinct forms whose study would reveal the characteristics of earlier stages of human evolution. Darwin's strategic use of intellectual disability is brought to bear on the controversy regarding the mental state of Darwin's last child.

Wallace, Alfred Russel (1823–1913)

2018 ◽  
Author(s):  
Barbara G. Beddall
Keyword(s):  
Natural Selection ◽  
Geographical Distribution ◽  
Charles Darwin ◽  
South American ◽  
Malay Archipelago ◽  
Evolutionary Thought

Co-discoverer with Charles Darwin of the theory of natural selection, Wallace travelled to the Amazon in 1848. Four years of collecting specimens there for sale in Europe revealed patterns of geographical distribution among animals. Unfortunately, much of his South American collection was lost in a fire at sea during the voyage home, which forced him to begin his collecting anew. This led to eight more years of travel (1854–62), this time in the Malay Archipelago, where he made his own momentous discovery of the theory of natural selection in 1858. An exceptionally clear thinker, he made many valuable contributions to evolutionary thought.

Introduction

1988 ◽  
Author(s):  
Keith Stewart Thomson
Keyword(s):  
Natural Selection ◽  
Phenotypic Variation ◽  
Charles Darwin ◽  
Dynamic Properties ◽  
Theory Of Evolution ◽  
Genetic Level ◽  
The Individual ◽  
Scientific Subject ◽  
Neutral Mutations ◽  
As If

All of science is fundamentally about cause. It is about explanations of the reasons things are the way they are and the mechanisms that produce them. It is now commonplace to observe that Charles Darwin brought evolution and all of organismal biology into line as a truly scientific subject by discussing evolutionary phenomena in terms of cause, and thus in the same testable, quantifiable frame of reference that applies to other science. Darwin's theory of natural selection as a causal agency for evolutionary change was only the beginning of our problems, not the end. For more than a hundred years, we have sought to find all the layers and intersecting lines of causality that produce natural selection as well as to discover other mechanisms for change that are nonselective in nature—genetic drift or neutral mutations, for example. Natural selection is basically a mechanism that involves two components: the introduction of variants into a system and the subsequent sorting of these variants (Vrba and Eldredge, 1984) so that, over generations, there is a differential contribution of these variants to higher levels such as populations and species. Up to the present time, most attention of evolutionists has concentrated upon two aspects of the problem: the genetic basis of phenotypic variation and the dynamic properties of populations containing the individual variants. The present book is concerned with the mechanisms affecting the expression of variation among individual phenotypes. It has been a surprisingly neglected subject. The New Synthetic theory of evolution and its later modifications have largely been pursued as if the intrinsic mechanisms by which variation is caused among individual organismal phenotypes are less important to the processes of evolution than the extrinsic mechanisms of sorting. If only by default, variation introduced at the level of the individual phenotypes is commonly treated as if it were a simple mapping of variation at the genetic level, or at least were only a very simple function of that. It has seemed not only necessary but sufficient to study genetics in order to understand phenotypic variation.

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