The orthogenetic development of some characteristic features during the evolution of the Hominidae has been pointed out. Especially brain- and skull development have been dwelt on . A parallel has been drawn with the orthogenetic development of some characteristic features during the evolution of the Equidae. It appears that during human evolution early-ontogenetic features come more and more to the front whereas during the evolution of Horses these characters are more and more pushed back in ontogeny. By this, human evolution, (...) at least as concerns the orthogenetically developing features which happen to be very characteristic of the organisation of Man, shows a generalising developmental tendency whereas that of Horses shows on the whole a specialising tendency.Some modes in which early-ontogenetic characters can be present in the adult stages are dealt with such asBolk's theory of retardation andSchindewolf's theory of proterogenesis which are considered not to differ very much in essentials. Also the principle of development along a roundabout way is mentioned in this connection and some examples are given.A better understanding of orthogenetic evolution and of the differences existing between that of the Hominidae and that of the Equidae is found in the principle of heterochronic development, the change of developmental intensity and the rate of growth of features in the ontogenies of allied forms. This is illustrated by the two diagrams of Fig. 2. Here we also established connection with the science of genetics which can explain experimentally the heterochronous shifting of features in compared ontogenies by difference in rate of action and quantitative action value of genes or sets of genes.Il est démontré que le développement phylogénétique de certains caractères morphologiques chez les Hominides est orthogénétique. Principalement le développement du cerveau et du crâne est discuté dans cette connection. Comparativement le développement orthogénétique de certains caractères pendant la phylogénie des Equides est traité. Il résulte que pendant l'évolution humaine des caractères fetaux se misent progressivement en premier plan dans les ontogénèses pendant que ceux dans la phylogénie des Equides se misent de plus en plus en arrière-plan ontogénétiquement. Dans cette manière l'évolution humaine montre, aux moins relative aux caractères orthogénétiques, qui sont exactement très caractéristiques pour l'organisation de l'Homme, une tendence généralisante de développement, celle des Equides au contraire une tendence spécialisante.Quelques possibilités avec lesquelles des caractères fetaux peuvent paraître dans la phase adulte sont discutées comme la théorie de retardation deBolk et la théorie de développement proterogénétique deSchindewolf. Celles-ci sont regardées comme principalement pas différentes. Aussi le principe de développement selon un détour est nommé dans cette connection et quelques exemples en sont donnés.Le principe du développement hétérochronique, le changement de l'intensité et de la vitesse du développement chez des caractères des formes alliés, nous donne un meilleur notion de l'évolution orthogénétique et de la différence, cité ci-dessus, entre la phylogénie humaine et celle des Equides. Ceci est démontré détaillé avec des exemples à l'aide des deux diagrammes de Fig. 2. Dans, cette façon une connection est mise avec la science génétique, qui peut expliquer expérimentalement le développement hétérochronique des caractères morphologiques dans des ontogénèses comparables par des différences dans la vitesse d'action et dans la réalisation quantitative des gènes.Es wird gezeigt wie die phylogenetische Entwicklung einiger charakteristischen Merkmale bei den Hominiden orthogenetisch verläuft. Vor allem werden Gehirn- und Schädelentwicklung in dieser Weise betrachtet. Vergleichenderweise wird die orthogenetische Entwicklung von einigen charakteristischen Merkmalen während der Phylogenie der Equidae besprochen. Es ergibt sich, dass während der menschlichen Evolution früh-ontogenetische Merkmale immer mehr in den Vordergrund treten während solche in der Phylogenie der Equiden immer mehr zurück treten in der Ontogenie. In dieser Weise zeigt sich die menschliche Evolution, wenigstens was den sich orthogenetisch entwickelnden Merkmalen anbelangt, welche gerade sehr charakteristisch für die Organisation des Menschen sind, eine verallgemeinerende Entwicklungstendenz, die der Equidae dagegen eine spezialisierende.Einige Möglichkeiten durch welche früh-ontogenetische Merkmale im erwachsenen Zustand auftreten können werden besprochen, so die Retardationstheorie vonBolk und die Proterogenesistheorie vonSchindewolf. Diese werden als nicht grundverschieden betrachtet. Auch das Prinzip der umwegigen Entwicklung vonNauck wird in diesem Zusammenhang genannt und einige Beispiele gegeben.Das Prinzip der heterochronischen Entwicklung, die Abänderung der Entwicklungsintensität und der Wachstumsgeschwindigkeit bei Merkmalen von verwandten Formen bietet uns einen besseren Begriff von der orthogenetischen Evolution und von dem oben angeführten Unterschied zwischen der menschlichen Phylogenie und der der Equidae. Dies wird näher ausgeführt und mit Beispielen belegt mit Hilfe der beiden Diagramme von Fig. 2. In dieser Weise wird auch eine Verbindung hergestellt mit der genetischen Wissenschaft, die in experimenteller Weise im Stande ist die heterochrone Verschiebung von Merkmalseigenschaften in vergleichbaren Ontogenesen durch Unterschiede in der Geschwindigkeit der Wirkung und in dem quantitativen Verwirklichungswert der Gene zu erklären. (shrink)

Historiography is becoming more critical of the typology/ population dichotomy introduced by Ernst Mayr. Therefore, one should look again at the problem of species in non-Darwinian theories: neo-Lamarckism and orthogenesis, and consider the possibility that this problem was overly simplified. What can be seen in both of them is the existence of a tension between the idea of evolution and the essence of species. In neo-Lamarckism, this tension was resolved by recognizing species as static entities which changed only when (...) triggered by external stimulus. In orthogenesis, evolution was seen as constant phenomena and species – as naturally changeable entities. However, orthogeneticists assumed that not only species, but also whole phyletic lines had essences that constrained their further evolution. Thus, in both cases we can see interpretation of species in tune with essentialism, but essentialism is widely differently integrated with each of these concepts of evolution. (shrink)

The relatively late acceptance of Darwinism in German biology and paleontology is frequently attributed to a lingering of Lamarckism, a persisting influence of German idealistic Naturphilosophie and Goethean romanticism. These factors are largely held responsible for the vitalism underlying theories of saltational and orthogenetic evolutionary change that characterize the writings of many German paleontologists during the first half of the 20th century. A prominent exponent of that tradition was Karl Beurlen, who is credited with having been the first German paleontologist (...) to present a full-fledged theory of saltational evolution and orthogenetic change. A review of Beurlen's writings reveals motives and concerns far more complex, however, and firmly rooted in contemporary völkisch thought and Aryan Science. Beurlen's mature theory of evolution can indeed be understood as his own contribution to Aryan Geology and Biology, tainted as it was with National-Socialist ideology. Evolutionary biologists of the time who opposed the theories of Beurlen and likeminded authors, i.e., idealistic morphology, typology, saltational change, orthogenesis and cyclism did so on Darwinian principles, which ultimately prevailed. But at the time when the battle was fought, their adherence to the principle of natural selection was likewise ideologically tainted, namely in terms of racial theory. National-Socialist ideology was unable to forge a unity of evolutionary theory in Germany even amongst those of its proponents who endorsed this ideology. (shrink)

Teilhard de Chardin's ideas about the mechanisms of biological evolution are revised and their connections with contemporary theories are reported. Teilhard de Chardin's main contribution is the proposal of a new scientific discipline, geobiology—the science of the biosphere evolving as a whole. The main fields of interest of geobiology are reported, and its relationships with contemporary hypotheses, such as Lovelock's Gaia, are discussed. The consequences of this kind of approach are the parallel evolution described as orthogenesis and the presence (...) of canalization phenomena. These Teilhardian hypotheses are discussed in relation to those of the process structuralists and to the novelties of the molecular evolution of the genome. Conclusions are that the mechanisms discussed by Teilhard are presently taken into consideration by contemporary evolutionists in order to construct a new theory of biological evolution. (shrink)

De Vries' mutation theory has not stood the test of time. The supposed mutations of Oenothera were in reality complex recombination phenomena, ultimately explicable in Mendelian terms, while instances of large-scale mutations were found wanting in other species. By 1915 the mutation theory had begun to lose its grip on the biological community; by de Vries' death in 1935 it was almost completely abandoned. Yet, as we have seen, during the first decade of the present century it achieved an enormous (...) popularity. As this paper has tried to suggest, one of the principal reasons for this was that de Vries' theory served as a banner around which a whole crowd of disaffected Darwinians or anti-Darwinians could rally. However, not all of those who favored de Vries did so for quite the same reasons. Underlying the multitude of views ran several common threads: a dissatisfaction with current Darwinian theory born out of misunderstanding natural selection, a general misunderstanding of the nature of species, and a prejudice against speculative, nontestable theories in biology.Supporters of de Vries were not the only opponents of Darwinism, nor was the mutation theory the only alternative to natural selection. In the early twentieth century a number of theories had been proposed to explain away the problems which Darwin had left unsolved. There was the idea of orthogenesis, championed by the American paleontologists Cope, Osborn and others; organic selection (or orthoplasy) was championed by M. M. Baldwin and C. Lloyd Morgan; there were the concepts of convergent evolution proposed by Hermann Friedmann, the theory of physiological selection by John George Romanes, and the concepts of reproductive divergence by H. M. Vernon. Virtually none of these men either accepted or were strong supporters of the de Vriesian theory, for each had his own particular ‘ism” to advocate as the major factor in evolution. The existence of a large number of such theories, each purporting to be the explanation, was characteristic of evolutionary theory at the turn of the century. It is to a large extent the emphasis on such fragmentary concepts that retarded development of the comprehensive theory of evolution which emerged in the 1920's and 1930's. For the historian, however, a study of these alternative theories is instructive in trying to understand the inherent difficulties which Dawwinian theory posed to biologists at the time. De Vries' mutation theory serves historically as a mirror to reflect the critical mood of a generation hostile to the theory of natural selection.It has often been claimed that it was impossible to understand the mechanism of natural selection until it could be placed in genetic and mathematical terms. It is certainly true that great strides have been made in population genetics and the treatment of evolutionary concepts with mathematical tools in the last forty years. But the very people who developed the genetical and mathematical approach to evolution were already convinced of the essential correctness of Darwinian theory before they started. Advances in an understanding of Mendelian heredity aided greatly in solving one important issue for evolutionists: the origin of variations. And the rigor with which selection acted could best be studied by observing changes in gene frequencies (calculated mathematically) over a number of generations. But as this paper has shown, two of the basic problems which biologists faced in evaluating Darwinian theory at the turn of the century-the nature of species, and the criteria of what constituted an acceptable explanation in biological science-could not be answered directly by mathematics. What mathematical and genetical theory did do was to help convince the skeptics of the validity of the Darwinian proposition.The change in explanatory criteria which many hailed as de Vries' most important contribution to evolutionary theory seems to have been part of a general emergence of twentieth-century biology from the domination of theorizers in the nineteenth. It also marked the emergence of America from the domination of biological, and particularly evolutionary, influence of Europeans. The change occurred in three areas: in the kinds of questions asked: testable versus non-testable; in the kind of data sought: quantitative versus qualitative; and in the kinds of theories proposed: analytical and reductive—the attempt to see complex processes in terms of simpler components-as opposed to synthetic and speculative. Although ultimately wrong in his idea, de Vries and his theories rode high on the wave of “experimentalism” which was the harbinger of a new era in evolutionary theory. (shrink)

ArgumentContrary to common portrayals of social Darwinism as a transference of laissez-faire values, the widely read evolutionism of Japan's foremost Darwinist of the early twentieth-century, Oka Asajirō (1868–1944), reflects a statist outlook that regards capitalism as the beginning of the nation's degeneration. The evolutionary theory of orthogenesis that Oka employed in his 1910 essay, “The Future of Humankind,” links him to a pre-Darwinian idealist tradition that depicted the state as an organism that develops through life-cycle stages. For Oka, laissez-faire (...) capitalism marked the moment when the state began to decline toward extinction due to the orthogenetic overdevelopment of hitherto subordinate individual egos. Because conservative bureaucrat-intellectuals had been drawing upon this same organicist-developmental tradition since the 1880s in an attempt to forestall the social ills of industrialism, Oka's call for statist measures, including eugenics, to lessen and delay the atomizing, enervating, and corrupting influence of capitalism articulated the political vision of officialdom. Statist evolutionism, not social Darwinism, might be the term that best describes Oka's approach. (shrink)

Abstract.The German zoologist and geneticist Ludwig Plate was a pupil and successor of the “German Darwin” Ernst Haeckel as the director of the Institute of Zoology at Jena University. Plate campaigned for a revival of the original Darwinism. His research program, which he labelled “old-Darwinism”, proclaimed the synthesis of selectionism with “moderate Lamarckism” and orthogenesis.This article reconstructs and analyses Plate’s “old-Darwinian” synthesis and sheds light on Plate’s controversial biography, especially his conflict with Haeckel.

Some understand the evolutionary process as more or less predictable; others stress its contingency. I argue that both Christian evolutionists who have assumed that the purposes of the Creator can be realized only through more or less predictable processes as well as those who infer from the contingency of the evolutionary process to the lack of purpose in the universe generally, are mistaken if the Creator escapes from the limits imposed on the creature by temporality, as the traditional Augustinian account (...) supposes. The notion of “purpose” must itself be reinterpreted in such a case. It makes no difference whether the appearance of Homo sapiens is the inevitable result of a steady process of complexification stretching over billions of years, or whether it comes about through a series of coincidences that would have made it entirely unpredictable from the (causal) human standpoint. Either way, the outcome is of God's making, and from the biblical standpoint may appear as part of God's plan. (shrink)

In his anthology of socio-political essays, Evolution and Human Life, Oka Asajirō, early twentieth century Japan’s foremost advocate of evolutionism, developed a biological vision of the nation-state as super-organism that reflected the concerns and aims of German-inspired Meiji statism and anticipated aspects of radical ultra-nationalism. Drawing on non-Darwinian doctrines, Oka attempted to realize such a fused or organic state by enhancing social instincts that would bind the minzoku and state into a single living entity. Though mobilization during the Russo-Japanese War (...) seemed to evince this super-organism, the increasingly contentious and complex society that emerged in the war’s aftermath caused Oka to turn first to Lamarckism and eventually to orthogenesis in the hopes of preserving the instincts needed for a viable nation-state. It is especially in the state interventionist measures that Oka finally came to endorse in order to forestall orthogenetically-driven degeneration that the technocratic proclivities of his statist orientation become most apparent. The article concludes by suggesting that Oka’s emphasis on degeneration, autarkic expansion, and, most especially, totalitarian submersion of individuals into the statist collectivity indicates a complex relationship between his evolutionism and fascist ideology, what recent scholarship has dubbed radical Shinto ultra-nationalism. (shrink)

This paper introduces the thought of Pierre Teilhard de Chardin from a perspective neglected until now: a view that builds on the analysis of his scientific papers. His scientific work formed part of the “modern synthesis” which laid the foundation of contemporary Darwinism. His main contributions in the field were the definition of a new branch of evolutionary sciences, geobiology; the redefinition of the term orthogenesis; and the proposal of the “scale” phyletic tree. Using these new research concepts, Teilhard (...) de Chardin attempted to solve, within a scientific framework, a problem fundamental for his philosophical synthesis: that of evolutionary directionality. (shrink)

In a paper entitled “Revolution in Permanence”, published in the collection “Karl Popper: Philosophy and Problems”, John Worrall (1995) severely criticised several aspects of Karl Popper’s work before commenting that “I have no doubt that, given suffi-cient motivation, a case could be constructed on the basis of such remarks that Popper had a more sophisticated version of theory production......” (p. 102). Part of Worrall’s criticism is directed at a “strawpopper”: in his “Darwinian Model” emphasising the similarities and differences between genetic (...) mutation, variation in animal behaviour and the gestation of scientific theories, Popper (1975, 1981, 1994) never stated that tentative scientific conjec-tures “while more or less random, are not completely blind.” He was referring to variation in animal species behaviour, and about tentative scientific conjectures he said nothing, although common sense would indicate that presumably he regarded them as being less blind and less random. In Popper (1977, 1983), giving a summary of his “Darwinian Model”, he repaired this omission about tentative scientific conjectures by inserting the sentence “On a level of World 3 theory formation they are of the character of planned gropings into the unknown.” Recent developments in the field of genetics (see for example Raff (1996), Lewis (1999), Korn (2002)) indicate that Popper’s intuitions were along the modern lines while Worrall’s intuitions are old fashioned. Therefore Popper’s “Darwinian Model” remains both viable and fruitful. (shrink)

In a paper entitled "Revolution in Permanence", published in the collection "Karl Popper: Philosophy and Problems", John Worrall severely criticised several aspects of Karl Popper's work before commenting that "I have no doubt that, given sufficient motivation, a case could be constructed on the basis of such remarks that Popper had a more sophisticated version of theory production......". Part of Worrall's criticism is directed at a "strawpopper": in his "Darwinian Model" emphasising the similarities and differences between genetic mutation, variation in (...) animal behaviour and the gestation of scientific theories, Popper never stated that tentative scientific conjectures "while more or less random, are not completely blind." He was referring to variation in animal species behaviour, and about tentative scientific conjectures he said nothing, although common sense would indicate that presumably he regarded them as being less blind and less random. In Popper, giving a summary of his "Darwinian Model", he repaired this omission about tentative scientific conjectures by inserting the sentence "On a level of World 3 theory formation they are of the character of planned gropings into the unknown." Recent developments in the field of genetics, Lewis, Korn ) indicate that Popper's intuitions were along the modern lines while Worrall's intuitions are old fashioned. Therefore Popper's "Darwinian Model" remains both viable and fruitful. (shrink)

In his anthology of socio-political essays, Evolution and Human Life, Oka Asajirō (1868-1944), early twentieth century Japan's foremost advocate of evolutionism, developed a biological vision of the nation-state as super-organism that reflected the concerns and aims of German-inspired Meiji statism and anticipated aspects of radical ultra-nationalism. Drawing on non-Darwinian doctrines, Oka attempted to realize such a fused or organic state by enhancing social instincts that would bind the minzoku (ethnic nation) and state into a single living entity. Though mobilization during (...) the Russo-Japanese War seemed to evince this super-organism, the increasingly contentious and complex society that emerged in the war's aftermath caused Oka to turn first to Lamarckism and eventually to orthogenesis in the hopes of preserving the instincts needed for a viable nation-state. It is especially in the state interventionist measures that Oka finally came to endorse in order to forestall orthogenetically-driven degeneration that the technocratic proclivities of his statist orientation become most apparent. The article concludes by suggesting that Oka’s emphasis on degeneration, autarkic expansion, and, most especially, totalitarian submersion of individuals into the statist collectivity indicates a complex relationship between his evolutionism and fascist ideology, what recent scholarship has dubbed radical Shinto ultra-nationalism. (shrink)