Human Evolution

On Purpose ◽  
2019 ◽  
pp. 153-165
Author(s):  
Michael Ruse
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Human Evolution ◽  
Charles Darwin ◽  
Darwinian Evolution ◽  
Close Relatives

This chapter analyzes Darwinian evolution through selection. It explores what the Kantian/Darwinian perspective implies for humans. Charles Darwin was absolutely convinced of the fact of human evolution and as soon as he had discovered natural selection was applying it to species, to minds and powers of thought no less. However, in the Origin he was cautious, wanting first to get the main details of his theory laid out for all to see and only at the end pointing to the implications for humankind. This did not stop others from getting on the bandwagon, and although in the Descent Darwin had much to say that was both new and interesting—notably about sexual selection—by then he was entering an already well-plowed field. Naturally, the early parts of Darwin's book were concerned with making the straightforward case for human evolution, showing how it is reasonable to think—especially on the evidence of homologies—that people and the higher apes are close relatives and that humans came jointly from organisms more primitive.

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.

scholarly journals Charles Darwin, sexual selection and the evolution of other-regarding ethics

BJHS Themes ◽  
2021 ◽  
pp. 1-21
Author(s):  
Piers J. Hale
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Charles Darwin ◽  
Future Research ◽  
Woman Question ◽  
Self Interest ◽  
Acquired Characters ◽  
Other Regarding ◽  
Descent Of Man ◽  
Selection Of

Abstract Although many read Charles Darwin's Origin of Species as an endorsement, rather than merely a description, of individualism and competition, in Descent of Man (1871) Darwin intended to show that natural selection could account for the most noble aspects of human morality and conscience. He did so in response to Alfred Russel Wallace's 1869 statement to the contrary. In doing so, Darwin appealed to the natural selection of groups rather than individuals, and to the maternal, parental and filial instincts, as the origin of truly other-regarding moral sentiments. Further, the inheritance of acquired characters and sexual selection had important implications for Darwin's understanding of how other-regarding ethics might prevail in an evolutionary framework that seemed to reward self-interest. In a short addendum to this essay I highlight just three of a number of Darwin's contemporaries who were impressed by this aspect of his work: the science popularizer Arabella Buckley, the Scottish Presbyterian scholar Henry Drummond and the anarchist geographer and naturalist Peter Kropotkin. In closing, I point to an extensive network of others who framed their concerns about both the ‘labour question’ and the ‘woman question’ in evolutionary terms, as a fruitful area for future research in this direction.

Darwin's Heresy

Philosophy ◽  
2018 ◽  
Vol 94 (1) ◽  
pp. 43-86 ◽  
Author(s):  
Lenn E. Goodman
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Human Evolution ◽  
Human Case ◽  
Sufficient Time

AbstractChallenged by Lord Kelvin's claims that earth and sun were too young to give evolution sufficient time to do its work, especially in the human case, where care for the weak blunts the edge of natural selection, Darwin leaned on Lamarckian thoughts to accelerate the process. The mental and moral traits crowning human distinctiveness, he urged, arose through sexual selection. But promiscuity, infanticide, early betrothals, and female drudgery undermined these effects in “savage races.” In the inevitable decline and ultimate extinction of the “melanin races” Darwin believed he could observe human evolution underway before his eyes.

Darwinism

On Purpose ◽  
2019 ◽  
pp. 91-113
Author(s):  
Michael Ruse
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Scientific Community ◽  
Charles Darwin ◽  
Slow Process ◽  
End Point ◽  
Julian Huxley ◽  
The World ◽  
Hans Christian Andersen ◽  
Descent Of Man

This chapter describes how Charles Darwin changed the world after publishing On the Origin of Species in 1859 and The Descent of Man in 1871. Although there were those who continued generally to stand firm against evolution, even the religious accepted that organisms, including humans, are the end point of a long, slow process of natural development. As in the Hans Christian Andersen tale about the lad who said openly that the king has no clothes, so when Darwin said “evolution,” almost everyone said that they had known it all along! Natural selection had more mixed success. Everyone accepted it to some extent. Julian Huxley, for instance, always had some doubts about its universal power and applicability, but when it came to humans physically, he was fully convinced of its overwhelming importance. This said, the scientific community was slower in coming to full acceptance, and it was more in the popular domain that natural selection—and even more sexual selection—was a huge success. Poets, novelists, politicians, and many others also harped on and on about its importance.

Sexual Selection, Mate Choice, and Competition for Mates

2021 ◽  
pp. 1-20
Author(s):  
Ingo Schlupp
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Subject Matter ◽  
Charles Darwin ◽  
Future Research ◽  
Original Formulation ◽  
Survival And Reproduction ◽  
The Subject ◽  
The Relationship

Well over a century ago Charles Darwin redefined biology and introduced the theory of natural selection. One of the problems he encountered was the existence of traits, mainly in males, that seemed to defy the principles of natural selection: they did not aid its bearers in survival and were often outright detrimental. Darwin solved this conundrum by introducing sexual selection. Unlike natural selection where all individuals compete with each other for survival and reproduction, in sexual selection individuals within each sex compete with each other for reproduction. In the original formulation of the principle, Darwin recognized two mechanisms for this. Males would compete with each other for access to females, and females would choose mating partners of their preference. In this opening chapter I want to introduce the topics to be covered in the book, define some basic terms that we will need to understand the subject matter, and define the questions to be asked. My aim for this book is to summarize our growing, yet still comparatively limited empirical knowledge and theory, and to provide suggestions for future research. What interests me most is the relationship between the four forms of sexual selection and their consequences.

scholarly journals The evolving spirit: morals and mutualism in Arabella Buckley's evolutionary epic

2017 ◽  
Vol 71 (4) ◽  
pp. 385-408
Author(s):  
Jordan Larsen
Keyword(s):  
Natural Selection ◽  
Natural Law ◽  
Charles Darwin ◽  
Darwinian Evolution ◽  
Natural Origin ◽  
Evolution Of Morality ◽  
Alfred Russel Wallace

Contemporaries of Charles Darwin were divided on reconciling his theory of natural selection with religion and morality. Although Alfred Russel Wallace stands out as a spiritualist advocate of natural selection who rejected a natural origin of morality, the science popularizer and spiritualist Arabella Buckley (1840–1929) offers a more representative example of how theists, whether spiritualist or more orthodox in their religion, found reconciliation. Unlike Wallace, Buckley emphasized the lawful evolution of morality and of the soul, drawing from the theological tradition of traducianism. Significantly, Buckley argued for a mutualistic and deeply theistic interpretation of Darwinian evolution, particularly the evolution of morals, without sacrificing the uniformity of natural law. Though Buckley's understanding of the evolutionary epic has been represented as emphasizing mutualism (Gates 1998) and spiritualist theology (Lightman 2007), here I demonstrate that her distinctive addition to the debate lies in her unifying theory of traducianism. In contrast to other authors, I argue that through Buckley we better understand Victorian spiritualism as more of a religion than an occult science. However, it was a conception of religion that, through her evolutionary traducianism, bridged science and spiritualism. This offers historians a more complex but satisfying image of the Victorian worldview after Darwin.

scholarly journals Evolution by Sexual Selection

2021 ◽  
Vol 9 ◽  
Author(s):  
Marion Petrie
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Charles Darwin ◽  
Female Preference ◽  
Rapid Adaptation ◽  
Theory Of Evolution ◽  
Distinct Process ◽  
Long Time ◽  
Evolution By Natural Selection ◽  
Descent Of Man

Charles Darwin published his second book “Sexual selection and the descent of man” in 1871 150 years ago, to try to explain, amongst other things, the evolution of the peacock’s train, something that he famously thought was problematic for his theory of evolution by natural selection. He proposed that the peacock’s train had evolved because females preferred to mate with males with more elaborate trains. This idea was very controversial at the time and it wasn’t until 1991 that a manuscript testing Darwin’s hypothesis was published. The idea that a character could arise as a result of a female preference is still controversial. Some argue that there is no need to distinguish sexual from natural selection and that natural selection can adequately explain the evolution of extravagant characteristics that are characteristic of sexually selected species. Here, I outline the reasons why I think that this is not the case and that Darwin was right to distinguish sexual selection as a distinct process. I present a simple verbal and mathematical model to expound the view that sexual selection is profoundly different from natural selection because, uniquely, it can simultaneously promote and maintain the genetic variation which fuels evolutionary change. Viewed in this way, sexual selection can help resolve other evolutionary conundrums, such as the evolution of sexual reproduction, that are characterised by having impossibly large costs and no obvious immediate benefits and which have baffled evolutionary biologists for a very long time. If sexual selection does indeed facilitate rapid adaptation to a changing environment as I have outlined, then it is very important that we understand the fundamentals of adaptive mate choice and guard against any disruption to this natural process.

The katydid that was: the tananá, stridulation, Henry Walter Bates and Charles Darwin

2014 ◽  
Vol 41 (1) ◽  
pp. 131-140 ◽  
Author(s):  
Claudio J. Bidau
Keyword(s):  
Sexual Selection ◽  
Charles Darwin ◽  
Bush Cricket

The Amazonian bush-cricket or katydid, Thliboscelus hypericifolius (Orthoptera: Tettigoniidae: Pseudophyllinae), called tananá by the natives was reported to have a song so beautiful that they were kept in cages for the pleasure of listening to the melodious sound. The interchange of letters between Henry Walter Bates and Charles Darwin regarding the tananá and the issue of stridulation in Orthoptera indicates how this mysterious insect, which seems to be very rare, contributed to the theory of sexual selection developed by Darwin.

Darwinian Evolutionary Theory

2018 ◽  
Author(s):  
Michael Ruse
Keyword(s):  
Sexual Selection ◽  
Natural Selection ◽  
Middle Class ◽  
Evolutionary Theory ◽  
Scientific Community ◽  
Homo Sapiens ◽  
Origin Of Species ◽  
Theory Of Evolution ◽  
Descent Of Man

Charles Robert Darwin, the English naturalist, published On the Origin of Species in 1859 and the follow-up work The Descent of Man in 1871. In these works, he argued for his theory of evolution through natural selection, applying it to all organisms, living and dead, including our own species, Homo sapiens. Although controversial from the start, Darwin’s thinking was deeply embedded in the culture of his day, that of a middle-class Englishman. Evolution as such was an immediate success in scientific circles, but although the mechanism of selection had supporters in the scientific community (especially among those working with fast-breeding organisms), its real success was in the popular domain. Natural selection, and particularly the side mechanism of sexual selection, were known to all and popular themes in fiction and elsewhere.

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