Familiarity with Charles Darwin's treatise on evolution is essential to every well-educated individual. One of the most important books ever published--and a continuing source of controversy, a century and a half later--this classic of science is reproduced in a facsimile of the critically acclaimed first edition.

In The Origin of Species (1859) Darwin challenged many of the most deeply-held beliefs of the Western world. Arguing for a material, not divine, origin of species, he showed that new species are achieved by "natural selection." The Origin communicates the enthusiasm of original thinking in an open, descriptive style, and Darwin's emphasis on the value of diversity speaks more strongly now than ever. As well as a stimulating introduction and detailed notes, this edition offers a register of the many (...) writers referred to by Darwin in the text. (shrink)

This paper retraces the occurrence of the word ‘organism’ in writings of different authors from the seventeenth to the nineteenth centuries. It seeks to clarify chronological and conceptual shifts in the usage and meaning of the word. After earlier uses of the word in medieval sources, the Latin word organismus appeared in 1684 in Stahl's medico-physiological writings. Around 1700 it can be found in French , English , Italian and later also in German . During the eighteenth century the word (...) ‘organism’ generally referred to a specific principle or form of order that could be applied to plants, animals or the entire world. At the end of the eighteenth century the term became a generic name for individual living entities. From around 1830 the word ‘organism’ replaced the expressions ‘organic’ or ‘organized body’ as a recurrent technical term in the emerging biological disciplines. (shrink)

L'auteur montre que Marx admet diverses formes de possibilités : abstraites ou théoriques, concrètes ou historiques, et surtout une possibilité réelle, celle d'un "règne de la liberté". Procédant à une analyse des textes, l'ouvrage enchaîne les catégories marxiennes essentielles : lois, causes, moyennes, tendances, forces, développement et finalité historiques. L'auteur souligne également l'influence d'Aristote et d'Epicure sur le mode marxien de pensée.

This important new study is an intellectual history exploring the reception of Darwinism by prominent German socialist theoriests: Karl Marx, Friedrich Engles, Friedrich Albert Lange, Ludwig B chner, August Bebel, Karl Katusky, and Eduard Bernstein. It relies not only on published books, articles, and speeches by these men, but also on some unpublished correspondence. In addition, one chapter covers the anti-socialist stance of prominent Darwinian biologists, including Charles Darwin and the foremost champion of Darwinism in Germany, Ernst Haeckel. Darwinism's effect (...) on German socialism's view of eugenics, race and religion are also discussed. (shrink)

WE HAVE LEARNED in the preceding chapter that a revolutionary change of the species concept is in the making, a change which not only affects taxonomic procedure, but which also contributes considerably toward a better understanding of ...

They are correct that punctuated equilibria apply to sexually reproducing organisms and that morphological evolutionary change is regarded as largely (if not exclusively) correlated with speciation events. However, they err in suggesting that we attribute stasis strictly to "developmental constraints," which represent only one of a set of possible mechanisms that we have suggested for the causes of stasis. Others include habitat tracking and the internal structure of species themselves [for example, (2)].

Species concepts for bacteria and other microbes are contentious, because they are often asexual. There is a Problem of Homogeneity: every mutation in an asexual lineage forms a new strain, of which all descendents are clones until a new mutation occurs. We should expect that asexual organisms would form a smear or continuum. What causes the internal homogeneity of asexual lineages, if they are in fact homogeneous? Is there a natural “species concept” for “microbes”? Two main concepts devised for metazoans (...) and metaphytes have been applied to bacteria. One is the Recombination Concept, a revised form of the Biological Species Concept in which the homogenizing mechanism is the sharing of genome fragments, somewhat akin to sexual recombination. The other is the Ecological Species Concept, in which the ecological niche is that which maintains lineages as cohesive. In this paper I will discuss these two concepts, and offer an underlying model that conjoins them, and consider the implications for species concepts in general. In short, my argument is that asexual species are instances of the most primitive and underived notion of species, which I will call “quasispecies”, following Eigen, and that sexual species are merely one derived kind of species. Moreover, I will argue that there is a continuum of recombination from simple viral models in which each strain is a clone, through to obligate recombination of 50% of the parents’ genome, and that consequently there is no sharp division between “microbial” and more familiar species. (shrink)

Myths, misunderstanding and neglect have combined to obscure our understanding of the relationship between left-wing politics and Darwinian science. This article seeks to redress the balance by studying how radical and socialist thinkers of the late nineteenth and early twentieth centuries, desperate to legitimate their work with scientific authority, wrestled with the paradoxical challenges Darwinism posed for their politics. By studying eight leading radical and socialist thinkers — ranging from the co-founder of the theory of evolution by natural selection, Alfred (...) Russel Wallace, through to Britain's first Labour Prime Minister, J. Ramsay MacDonald — this article analyses the often tortuous relationship between Darwinism and the left, as well as providing fresh insights into the historiographical debate over ‘continuity’ in radicalism and socialism. A strict definition of ‘Darwinian’ is adopted throughout, in order to help us delineate what was specifically ‘Darwinian’ from what merely reflected the general evolutionary ethos of the age, in left-wing thought, and to move us beyond the sensational and distorting focus on eugenics which has characterized previous studies. (shrink)