The paper characterizes Darwin's theory, providing a synthesis of recent historical investigations in this area. Darwin's reading of Malthus led him to appreciate the importance of population pressures, and subsequently of natural selection, with the help of the wedge metaphor. But, in itself, natural selection did not furnish an adequate account of the origin of species, for which a principle of divergence was needed. Initially, Darwin attributed this to geographical isolation, but later, following his work on barnacles which underscored the (...) significance of variation, and arising from his work on botanical arithmetic, he supposed that diversity allowed more places to be occupied in a given region. So isolation was not regarded as essential. Large regions with intense competition, and with ample variation spread by blending, would facilitate speciation. The notion of place was different from niche, and it is questioned whether Darwin's views on ecology were as modern as is commonly supposed. Two notions of struggle are found in Darwin's theory; and three notions of variation. Criticisms of his theory led him to emphasize the importance of variation over a range of forms. Hence the theory was populational rather than typological. The theory required a Lamarckian notion of inheritable changes initiated by the environment as a source of variation. Also, Darwin deployed a use/habit theory; and the notion of sexual selection. Selection normally acted at the level of the individual, though kin selection was possible. Group selection was hinted at for man. Darwin's thinking (and also the exposition of his theory) was generally guided by the domestic-organism analogy, which satisfied his methodological requirement of a vera causa principle. (shrink)

ABSTRACTThis article considers the relationship of Heidegger's metaphysics of Being-toward-death to what Heidegger describes as “the enigma of motion,” that is, to Dasein's “historicality.” In doing so, the article confronts a series of questions concerning fundamental realities of animate life, realities centering on angst in the face of death, but including curiosity and fear, for example, all such realities being what Heidegger terms “states-of-mind” or “moods.” Thus, the article basically questions Heidegger's elision of a Leibkörper, not only in terms of (...) feelings but in terms of an exaltation of language, an insular notion of Dasein's historicality, and a narrow and deficient depiction of animals in his “philosophical biology.” Through a critical examination of the phenomenological disclosure that Heidegger seeks in his metaphysics of Being-toward-death, the article shows that death and the very concept of death hinges on being a body, a temporally finite animate body. Thus, however metaphysical its exposition, Being-toward-death is existentially anchored in being a body. (shrink)

ABSTRACTThis article considers the relationship of Heidegger's metaphysics of Being-toward-death to what Heidegger describes as “the enigma of motion,” that is, to Dasein's “historicality.” In doing so, the article confronts a series of questions concerning fundamental realities of animate life, realities centering on angst in the face of death, but including curiosity and fear, for example, all such realities being what Heidegger terms “states-of-mind” or “moods.” Thus, the article basically questions Heidegger's elision of a Leibkörper, not only in terms of (...) feelings but in terms of an exaltation of language, an insular notion of Dasein's historicality, and a narrow and deficient depiction of animals in his “philosophical biology.” Through a critical examination of the phenomenological disclosure that Heidegger seeks in his metaphysics of Being-toward-death, the article shows that death and the very concept of death hinges on being a body, a temporally finite animate body. Thus, however metaphysical its exposition, Being-toward-death is existentially anchored in being a body. (shrink)

Lamarck's perspective on change within the organic world, in particular his conception of "la marche de la nature," , crystallized during the last decade of the 18th century and the early years of the 19th. I argue that it should be viewed as resulting in part from interactions with, and transfers from, the social thought—modes of thinking, ways of conceptualizing, models, metaphors and analogies—of the decades before the French revolution and of the revolutionary decade itself. Moreover, Lamarck's involvement with the (...) new institutional frameworks initiated during the revolutionary period had brought him into direct contacts with the then prevalent modes of discourse on things social. (shrink)