On the Legitimacy of the Darwinian Theory – August Weismann's First Creed

2013 ◽  
Vol 26 (1) ◽  
pp. 173-179
Author(s):  
Charlotte Weissman
Keyword(s):  
Natural Selection ◽  
Evolutionary Theory ◽  
Evolutionary Change ◽  
August Weismann ◽  
Darwinian Theory ◽  
Inaugural Lecture ◽  
Future Theory

ArgumentIn his inaugural lecture, “On the Legitimacy of the Darwinian Theory,” August Weismann followed closely in Darwin's footsteps, but provided at the same time an outline of the essentials of his future theory of heredity, development, variation, and speciation. This was Weismann's first support of the evolutionary theory, and it shows his commitment to natural selection as the mechanism of evolution. For Weismann, “Darwin's Theory” meant natural selection. Natural selection, and more generally selectionism, became Weismann's major explanatory principle for evolutionary change and the most important element driving his thought.

scholarly journals Constructor theory of life

2015 ◽  
Vol 12 (104) ◽  
pp. 20141226 ◽  
Author(s):  
Chiara Marletto
Keyword(s):  
Natural Selection ◽  
Evolutionary Theory ◽  
Digital Information ◽  
Evolution Theory ◽  
Physical Processes ◽  
Darwinian Theory ◽  
Gene Replication ◽  
Theory Of Information ◽  
Living Organisms

Neo-Darwinian evolutionary theory explains how the appearance of purposive design in the adaptations of living organisms can have come about without their intentionally being designed. The explanation relies crucially on the possibility of certain physical processes : mainly, gene replication and natural selection . In this paper, I show that for those processes to be possible without the design of biological adaptations being encoded in the laws of physics, those laws must have certain other properties. The theory of what these properties are is not part of evolution theory proper, yet without it the neo-Darwinian theory does not fully achieve its purpose of explaining the appearance of design. To this end, I apply constructor theory's new mode of explanation to express exactly within physics the appearance of design, no-design laws, and the logic of self-reproduction and natural selection. I conclude that self-reproduction, replication and natural selection are possible under no-design laws, the only non-trivial condition being that they allow digital information to be physically instantiated. This has an exact characterization in the constructor theory of information. I also show that under no-design laws an accurate replicator requires the existence of a ‘vehicle’ constituting, together with the replicator, a self-reproducer.

On the Legitimacy of the Darwinian Theory

2013 ◽  
Vol 26 (1) ◽  
pp. 181-201
Author(s):  
August Weismann
Keyword(s):  
Natural Selection ◽  
August Weismann ◽  
Darwinian Theory ◽  
The Core ◽  
Scientific Hypothesis ◽  
Migration Law

ForewordThe motivation for the publication of this lecture is my firm belief that any word that can even slightly clarify and advance the powerful and fruitful idea of the transmutation of species is of value.First, I wish to put an end to the futile discussions which go nowhere since they ignore accumulated knowledge and always start from scratch. I want to proclaim that at the core of the Darwinian theory, regardless of its merit as a whole, lies the transmutation hypothesis, which is nowadays the only legitimate scientific hypothesis on the origin of organic forms. Therefore, futurescientificdiscussions should focus on Darwinian theory alone, as its foundation is irrefutable.This lecture has been printed completely unchanged and unavoidable necessary additions have been transferred to footnotes. This article was already completed when Moritz Wagner'sThe Darwinian theory and the migration law of organism1*was published. Wagner attempts to diminish the role of natural selection in Darwin's theory and I challenge this view in the appendix, which also addresses the factors Wagner emphasized as influencing speciation.Freiburg im Breisgau, August 2, 1868August Weismann

Siren canora: the mermaid and the mythical in late nineteenth-century science

2008 ◽  
Vol 35 (1) ◽  
pp. 1-14 ◽  
Author(s):  
H. BRINK-ROBY
Keyword(s):  
Nineteenth Century ◽  
Evolutionary Theory ◽  
Focus Of Attention ◽  
British Association ◽  
Social Boundaries ◽  
Late Nineteenth Century ◽  
Darwinian Theory ◽  
Late Nineteenth ◽  
Century Science

This paper argues that, for a number of naturalists and lay commentators in the second half of the nineteenth century, evolutionary – especially Darwinian – theory gave new authority to mythical creatures. These writers drew on specific elements of evolutionary theory to assert the existence of mermaids, dragons and other fabulous beasts. But mythological creatures also performed a second, often contrapositive, argumentative function; commentators who rejected evolution regularly did so by dismissing these creatures. Such critics agreed that Darwin's theory legitimized the mythological animal, but they employed this legitimization to undermine the theory itself. The mermaid, in particular, was a focus of attention in this mytho-evolutionary debate, which ranged from the pages of Punch to the lecture halls of the British Association for the Advancement of Science. Crossing social boundaries and taking advantage of a range of venues, this debate arose in response to the indeterminate challenge of evolutionary theory. In its discussions of mermaids and dragons, centaurs and satyrs, this discourse helped define that challenge, construing and constructing the meanings and implications of evolutionary theory in the decades following Darwin's publication.

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.

‘Short-Spanned Living Creatures’: Evolutionary Perspectives in Rhoda Broughton’s Not Wisely, but Too Well (1867)

2021 ◽  
Author(s):  
James Aaron Green
Keyword(s):  
Natural Selection ◽  
Evolutionary Theory ◽  
Simple Structure ◽  
Charles Darwin ◽  
Origin Of Species ◽  
Charles Lyell ◽  
Crystal Palace ◽  
The Status ◽  
The Individual ◽  
Evolutionary Perspectives

Abstract In Geological Evidences of the Antiquity of Man (1863), Charles Lyell appraised the distinct contribution made by his protégé, Charles Darwin (On the Origin of Species (1859)), to evolutionary theory: ‘Progression … is not a necessary accompaniment of variation and natural selection [… Darwin’s theory accounts] equally well for what is called degradation, or a retrogressive movement towards a simple structure’. In Rhoda Broughton’s first novel, Not Wisely, but Too Well (1867), written contemporaneously with Lyell’s book, the Crystal Palace at Sydenham prompts precisely this sort of Darwinian ambivalence to progress; but whether British civilization ‘advance[s] or retreat[s]’, her narrator adds that this prophesized state ‘will not be in our days’ – its realization exceeds the single lifespan. This article argues that Not Wisely, but Too Well is attentive to the irreconcilability of Darwinism to the Victorian ‘idea of progress’: Broughton’s novel, distinctly from its peers, raises the retrogressive and nihilistic potentials of Darwin’s theory and purposes them to reflect on the status of the individual in mid-century Britain.

scholarly journals Evolution and evolvability: celebrating Darwin 200

2008 ◽  
Vol 5 (1) ◽  
pp. 44-46 ◽  
Author(s):  
John F.Y Brookfield
Keyword(s):  
Genetic Variation ◽  
Natural Selection ◽  
Time Scales ◽  
Evolutionary Change ◽  
Adaptive Mutation ◽  
Genetic Covariances ◽  
The Relationship ◽  
The Way

The concept of ‘evolvability’ is increasingly coming to dominate considerations of evolutionary change. There are, however, a number of different interpretations that have been put on the idea of evolvability, differing in the time scales over which the concept is applied. For some, evolvability characterizes the potential for future adaptive mutation and evolution. Others use evolvability to capture the nature of genetic variation as it exists in populations, particularly in terms of the genetic covariances between traits. In the latter use of the term, the applicability of the idea of evolvability as a measure of population's capacity to respond to natural selection rests on one, but not the only, view of the way in which we should envisage the process of natural selection. Perhaps the most potentially confusing aspects of the concept of evolvability are seen in the relationship between evolvability and robustness.

scholarly journals The genomics of adaptation

2012 ◽  
Vol 279 (1749) ◽  
pp. 5024-5028 ◽  
Author(s):  
Jacek Radwan ◽  
Wiesław Babik
Keyword(s):  
Genetic Variation ◽  
Natural Selection ◽  
Royal Society ◽  
Genetic Basis ◽  
Genomic Data ◽  
Evolutionary Change ◽  
Introductory Article ◽  
Technological Advances ◽  
A Genome ◽  
Genome Level

The amount and nature of genetic variation available to natural selection affect the rate, course and outcome of evolution. Consequently, the study of the genetic basis of adaptive evolutionary change has occupied biologists for decades, but progress has been hampered by the lack of resolution and the absence of a genome-level perspective. Technological advances in recent years should now allow us to answer many long-standing questions about the nature of adaptation. The data gathered so far are beginning to challenge some widespread views of the way in which natural selection operates at the genomic level. Papers in this Special Feature of Proceedings of the Royal Society B illustrate various aspects of the broad field of adaptation genomics. This introductory article sets up a context and, on the basis of a few selected examples, discusses how genomic data can advance our understanding of the process of adaptation.

The Causal Structure of Natural Selection

2021 ◽  
Author(s):  
Charles H. Pence
Keyword(s):  
Natural Selection ◽  
Case Studies ◽  
Genetic Drift ◽  
Evolutionary Theory ◽  
Causal Structure ◽  
Philosophy Of Biology ◽  
Philosophy Of Physics ◽  
Potential Value ◽  
Multi Level ◽  
Evolutionary Explanations

Recent arguments concerning the nature of causation in evolutionary theory, now often known as the debate between the 'causalist' and 'statisticalist' positions, have involved answers to a variety of independent questions – definitions of key evolutionary concepts like natural selection, fitness, and genetic drift; causation in multi-level systems; or the nature of evolutionary explanations, among others. This Element offers a way to disentangle one set of these questions surrounding the causal structure of natural selection. Doing so allows us to clearly reconstruct the approach that some of these major competing interpretations of evolutionary theory have to this causal structure, highlighting particular features of philosophical interest within each. Further, those features concern problems not exclusive to the philosophy of biology. Connections between them and, in two case studies, contemporary metaphysics and philosophy of physics demonstrate the potential value of broader collaboration in the understanding of evolution.

scholarly journals Evolutionary biology today and the call for an extended synthesis

2017 ◽  
Vol 7 (5) ◽  
pp. 20160145 ◽  
Author(s):  
Douglas J. Futuyma
Keyword(s):  
Natural Selection ◽  
Evolutionary Theory ◽  
Evolutionary Biology ◽  
Epigenetic Inheritance ◽  
Reaction Norm ◽  
Evolutionary Synthesis ◽  
Historical Background ◽  
Extended Evolutionary Synthesis ◽  
Extended Synthesis ◽  
Proximate Causation

Evolutionary theory has been extended almost continually since the evolutionary synthesis (ES), but except for the much greater importance afforded genetic drift, the principal tenets of the ES have been strongly supported. Adaptations are attributable to the sorting of genetic variation by natural selection, which remains the only known cause of increase in fitness. Mutations are not adaptively directed, but as principal authors of the ES recognized, the material (structural) bases of biochemistry and development affect the variety of phenotypic variations that arise by mutation and recombination. Against this historical background, I analyse major propositions in the movement for an ‘extended evolutionary synthesis’. ‘Niche construction' is a new label for a wide variety of well-known phenomena, many of which have been extensively studied, but (as with every topic in evolutionary biology) some aspects may have been understudied. There is no reason to consider it a neglected ‘process’ of evolution. The proposition that phenotypic plasticity may engender new adaptive phenotypes that are later genetically assimilated or accommodated is theoretically plausible; it may be most likely when the new phenotype is not truly novel, but is instead a slight extension of a reaction norm already shaped by natural selection in similar environments. However, evolution in new environments often compensates for maladaptive plastic phenotypic responses. The union of population genetic theory with mechanistic understanding of developmental processes enables more complete understanding by joining ultimate and proximate causation; but the latter does not replace or invalidate the former. Newly discovered molecular phenomena have been easily accommodated in the past by elaborating orthodox evolutionary theory, and it appears that the same holds today for phenomena such as epigenetic inheritance. In several of these areas, empirical evidence is needed to evaluate enthusiastic speculation. Evolutionary theory will continue to be extended, but there is no sign that it requires emendation.

Cooperation, Coordination, and Collective Action

2012 ◽  
Author(s):  
Lee Cronk ◽  
Beth L. Leech
Keyword(s):  
Natural Selection ◽  
Collective Action ◽  
Political Science ◽  
Empirical Research ◽  
Evolutionary Theory ◽  
Coordination Problems ◽  
Evolutionary Biologist ◽  
Wide Range ◽  
Two Bodies

This book investigates a wide range of ideas, theories, and existing empirical research relevant to the study of the complex and diverse phenomenon of human cooperation. Issues relating to cooperation are examined from the perspective of evolutionary theory, political science, and related social sciences. The book draws upon two bodies of work: Mancur Olson's The Logic of Collective Action (1965) and George C. Williams's Adaptation and Natural Selection (1966). Olson, an economist, and Williams, an evolutionary biologist, both argued that a focus on groups would not provide a complete understanding of collective action and other social behaviors. This introductory chapter discusses some important definitions relating to cooperation, with particular emphasis on collective action and collective action dilemmas, along with coordination and coordination problems. It also provides an overview of the chapters that follow.

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