In this paper, I argue that Kant adopted, throughout his career, a position that is much more akin to classical accounts of epigenesis, although he does reject the more radical forms of epigenesis proposed in his own time, and does make use of preformationist sounding terms. I argue that this is because Kant thinks of what is pre-formed as a species, not an individual or a part of an individual; has no qualm with the idea of a specific, teleological principle (...) or force underlying generation, and conceives of germs and predispositions as specific constraints on such a principle or force. Neither of these conceptions of what is “preformed”, I argue, is in strict opposition to classical epigenesis. I further suggest that Kant’s lingering use of preformationist terminology is due to his belief that this is required to account for the specificity of the specific generative force; his resistance towards the unrestricted plasticity of the generative force in radical epigenesis, which violates species-fixism; and his insistence on the internal, organic basis of developmental plasticity and variation within species. I conclude by suggesting that this terminological and interpretative peculiarity is partly due to a larger shift in the natural philosophical concerns surrounding the debate on epigenesis and preformation. Specifically, it is a sign that the original reasons for resisting epigenesis, namely its use of specific, teleological principles and its commitment to the natural production of biological structure, became less of a concern, whereas unrestricted plasticity and its undermining of fixism became a real issue, thereby also becoming the focal point of the debate. (shrink)

In this paper, I argue that Kant adopted, throughout his career, a position that is much more akin to classical accounts of epigenesis, although he does reject the more radical forms of epigenesis proposed in his own time, and does make use of preformationist sounding terms. I argue that this is because Kant (1) thinks of what is pre-formed as a species, not an individual or a part of an individual; (2) has no qualm with the idea of a specific, (...) teleological principle or force underlying generation, and conceives of germs and predispositions as specific constraints on such a principle or force. Neither of these conceptions of what is “preformed”, I argue, is in strict opposition to classical epigenesis. I further suggest that Kant’s lingering use of preformationist terminology is due to (1) his belief that this is required to account for the specificity of the specific generative force; (2) his resistance towards the unrestricted plasticity of the generative force in radical epigenesis, which violates species-fixism; and (3) his insistence on the internal, organic basis of developmental plasticity and variation within species. I conclude by suggesting that this terminological and interpretative peculiarity is partly due to a larger shift in the natural philosophical concerns surrounding the debate on epigenesis and preformation. Specifically, it is a sign that the original reasons for resisting epigenesis, namely its use of specific, teleological principles and its commitment to the natural production of biological structure, became less of a concern, whereas unrestricted plasticity and its undermining of fixism became a real issue, thereby also becoming the focal point of the debate. (shrink)

Jan Swammerdam was one of the first scientists to do biological research on the basis of physico‐theology. He was a very religious man and thought that by studying the secrets of nature he could best serve the Almighty God. He saw his life's work in demostrating the importance of God in the world of the smallest animals. The most important works of Swammerdam refer to the world of the insects and other lower animals, which he called the „legions of the (...) God of Israel”︁, through which God tells mankind to recognize their sins, to desist from them and to honour him with greater humility. „The miracles of nature”︁ he said „are an open bible, which everywhere points to God as its eternal origin.”︁ This is one of the reasons for the title of the work Biblia naturae. It was Swammerdam's declared aim to demonstrate that the insects were no less perfect than the higher animals. Therefore, he tried to refute all three arguments used by his contemporaries to show up the difference between the higher animals and the insects: 1. insects were believed to have no inner anatomy; 2. they were thought to originate by spontanous generation; 3. development occurred through „metamorphosis”︁. Swammerdam succeeded in refuting all three arguments by exact studies of the nature and development of the insects. Most important for him was his aim to demonstrate that even the structure and the development of the smallest of animals demonstrate that they could only be made by God himself. Science as God's worship must be strictly objective, he said, because only than could one understand the laws of nature and in this way the real nature of God himself. (shrink)

Already in classical antiquity people dealt with the principle of formation, developing different theories. Researchers in the renaissance, working in the conflict zone between tradition and experience, tried to prove one or the other of these theories by the means of new observations, especially of chicken development. Aldrovandi was the first to see the real principle of formation of the hen's egg, i. e. the blastodisc, but he didn't recognize the importance of his discovery due to his close adherence to (...) Aristotle in the theoretical field. Fabricius even thought that traditional knowledge was of more importance than his own excellent observations. Parisano was the first to succeed in making a correct interpretation of the function of the blastodisc, but only by holding to a ‘false’ classical theory. Harvey combined his attempt to restore the developmental theory of Aristotle with a religious interpretation postulating God's intervention in all development. Subsequent to atomism, Highmore evolved a two seed theory of development, which in his view made a permanent engagement of God superfluous. Also the first observations using the microscope did not contribute to any improvement in developmental theory. Malpighi used them to confirm the theory of epigenesis, whereas Croone attributed to a piece of blastoderm the proportion of a whole embryo to demonstrate his ovistic theory of preformation. The founder of animalculism Leeuwenhoek, an amateur researcher, was at first not influenced by the trends of the scientific community. He postulated that the spermatozoa, which he discovered, contained perfect miniature animals. His investigations are a good example of where prejudices can lead, even when the observations are excellent. In the 17th century the tension between experience and tradition shifted in favour of experience, but a final solution had not by any means been reached. (shrink)

The aim of this paper is to elucidate the vital meaning and strategic role that nutrition holds in Claude Bernard’s “biological philosophy”, in the sense Auguste Comte gave to this expression, _i.e._ the theoretical part of biology. I propose that Bernard’s nutritive perspective on life should be thought of as an “interfield” object, following Holmes’ category. Not only does nutrition bridge disciplines like physiology and organic chemistry, as well as levels of inquiry ranging from special physiology to the organism’s total (...) level, including the cell and protoplasm, but it also forms the genetic and structural foundation for Bernard’s two fundamental axioms in general physiology: the necessary complementarity of destruction and creation (1) and the uniformity of this physiological law across all life forms, be it plants or animals (2). Because Bernard’s nutritive theory is a major pivot for the re-ordering of life and its characterization, I argue that it must be located and understood in the scientific and metaphysical context of his time, of which he claims to be the heir and challenger—what I propose to characterize as the “epistemic space” of nutrition, on the background of which Bernard builds his own “logic”. I then set out this _logic of nutrition_, focusing on three interrelated bernardian theses: the establishment of the theory of indirect nutrition as the basis for the notion of “milieu intérieur”; the enduring conception of nutrition as a continuous generation; the emphasis on nutrition as a way of reshaping the form/matter relationship. (shrink)

This paper seeks to characterize how the study of nutrition processes contributed to revisit the problem of vital organization in the late eighteenth century. It argues that focusing on nutrition leads to reformulate the problem of the relation between life and organization in terms of processes, rather than static or given structures. This nutrition-centered approach to life amounts to acknowledge the specific strategic role nutrition played in the development of a materialist approach to the generation of vital organization. The paper (...) proposes a clarification of the multiple meanings of the concept of organization in the context of Enlightenment physiology and nascent biology, before focusing on the century long analogy between nutrition and generation. It shows how, by contrasting different uses of this analogy, nutrition was employed as a key vital phenomenon in the development of epigenetic theories of generation, i.e. how a nutritive modeling of generation was used in the undermining of preformationism. To this purpose I contrast two seemingly opposite theories of generation, Buffon’s and Bonnet’s, and show that despite the obvious metaphysical discontent, their views of generation share a common mechanical conceptual frame in which nutrition is conflated with growth and repair. I then turn to the role nutrition played in the epigenetic conception of generation in C. F. Wolff’s embryology and analyze this rival understanding of nutrition as an organizing process. (shrink)

The focus of this paper is a fascinating but hitherto unstudied 1742 manuscript treatise by Johannes Daniel Schlichting (1705–1765) titled “Sapientiæ Problema” that contains something extremely rare in the mid-eighteenth century: a full-blown speculative cosmogony. As this article reveals, Schlichting developed a distinctive vital liquid matter in an effort to account for the generation of all natural bodies and combat the stamina-based theories that were dominant in his day. He hoped that his treatise would be published in the Philosophical Transactions (...) of the Royal Society, but an accompanying abridgment by the FRS Henry Baker (1698–1774) strongly implies that Schlichting’s speculative bent and desire to divulge causal explanations were unacceptable to the Englishman and generally ill-suited to the intellectual climate of mid-century England. (shrink)

In recent years a certain emphasis has been put by some scholars on Leibniz’s concern about empirical sciences and the relations between such concern and the development of his mature metaphysical system. In this paper I focus on Leibniz’s interest for the microscope and the astonishing discoveries that such instrument made possible in the field of the life sciences during the last part of the Seventeenth century. The observation of physical bodies carried out by the “magnifying glasses” revealed a matter (...) swarming everywhere with life and activity, contrary to the cartesian and atomistic view of matter as something sterile and passive. Moreover, the discovery of uncountable complete “animalcula” living in the smallest drop of water provided evidence for the idea of the preformation of every organism. During his lifetime, Leibniz was extremely watchful about the new microscopical discoveries and came into contact with some of the major “observers” of his time, such as Hooke, Leeuwenhoek, Swammerdam and Malpighi. Relying both on some passages in Leibniz’s texts and on recent critical studies, I will argue that important aspects of his metaphysics have been strongly affected by the empirical observation of the “invisible world” which the microscope made possible. In the last part of the paper I show how the concept of “preformation”, originally drawn from the context of the life sciences, comes to play in Leibnizʼs philosophy a very general role, going far beyond the scope of biology and shaping important aspects of his overall philosophical system. (shrink)

ABSTRACTThis paper studies Antoine Le Grand's account of organic identity over time in human bodies. In response to Aristotelian critics who argued that the Cartesian rejection of the Aristotelian ontology of matter and form had put in jeopardy the diachronic identity of material substances in general and of living bodies in particular, Le Grand argued that the identity over time of the human body could be accounted for without the traditional notions of matter and form. The paper shows how he (...) drew on both the Cartesian metaphysics of mind and body and contemporary views on human anatomy and organic generation to develop a unique account of bodily identity over time in human animals. (shrink)

ArgumentThe question, how organisms obtain their specific complex and functional forms, was widely discussed during the eighteenth century. The theory of preformation, which was the dominant theory of generation, was challenged by different alternative epigenetic theories. By the end of the century it was the vitalist approach most famously advocated by Johann Friedrich Blumenbach that prevailed. Yet the alternative theory of generation brought forward by Caspar Friedrich Wolff was an important contribution to the treatment of this question. He turned his (...) attention from the properties of matter and the forces acting on it towards the level of the processes of generation in order to explain the constitution of organismic forms. By regarding organic structures and forms to be the result of the lawfulness of ongoing processes, he opened up the possibility of a functional but non-teleological explanation of generation, and thereby provided an important complement to materialist and vitalist approaches. (shrink)

In the late 1720s, Daniel Turner and James Blondel engaged in a pamphlet dispute over the power of the maternal imagination. Turner accepted the long-standing belief that a pregnant woman's imagination could be transferred to her unborn child, imprinting the foetus with various marks and deformities. Blondel sought to refute this view on rational and anatomical grounds. Two issues repeatedly received these authors' attention: the identity of imagination, and its power in pregnant women; and the process of generation and foetal (...) development. In their discussions of these issues, differences between the authors' acceptance of general medical theories and philosophies became apparent. Blondel invoked Newtonian matter theory, experimental philosophy, and iatro-mechanism, while Turner adhered more to the authority of the Ancients and advocated a more direct role for the Creator as an alternative to mechanism in explaining natural phenomena. Additionally, the authors held differing views of what they regarded as experience. The widespread contemporary interest in their dispute suggests that Turner and Blondel raised the phenomenon of the maternal imagination from an issue of folk belief to a concern of eighteenth-century medicine. (shrink)

The aim of this work is to present the thesis “On the Ontogenetic Evolution of the Human Embryo in its Relations with Phylogenesis,” by Affonso Regulo de Oliveira Fausto, published in Brazil in 1890. To our knowledge, it was one of the first Brazilian academic works focused specifically on evolution. It was also the first doctoral thesis that addressed the topic of recapitulation in order to analyze what was then called the progressive evolution of the human species in tandem with (...) the embryological development of the individuals that would constitute the Brazilian “type.” In the present work, we analyze the author’s thesis in relation to its sources, concepts, as well as the country’s political context at the time of its publication. Fausto’s text, in which he explicitly recognized the influence of Ernst Haeckel’s recapitulation theory, represents a window to understand better a concept of nation based on science and on the idea of inexorable progress that was accepted in Brazil at the end of the nineteenth century. (shrink)

For the mature Leibniz, a living being is a created substance composed of an infinitely complex organic body and a simple, immaterial soul. Soul and body do not interact directly, but rather their states correspond according to a harmony preestablished by God. I show that Leibniz’s theory faces challenges with respect to the question of whether substances need to possess knowledge of how they bring about their effects, and I argue that, to address these challenges, Leibniz turns to a concept (...) of “divine preformation” that he attributes to both soul and body. Insofar as divine preformation provides Leibniz with an explanation for how soul and body can both act without possessing explicit knowledge of what they are doing, it serves as a key tool for justifying the theory of preestablished harmony. (shrink)

This is an introduction to a collection of articles on the conceptual history of epigenesis, from Aristotle to Harvey, Cavendish, Kant and Erasmus Darwin, moving into nineteenth-century biology with Wolff, Blumenbach and His, and onto the twentieth century and current issues, with Waddington and epigenetics. The purpose of the topical collection is to emphasize how epigenesis marks the point of intersection of a theory of biological development and a theory of active matter. We also wish to show that the concept (...) of epigenesis existed prior to biological theorization and that it continues to permeate thinking about development in recent biological debates. (shrink)

Biological development is about history, the history of an individual through time. Historically, the dominant epigenetic tradition has seen the developmental process as an unfolding of potential or in terms of the emergence of new organization that becomes an individual organism over time. The concept of development has included differentiation, growth, and morphogenesis; since the mid-nineteenth century, it has been seen in terms of cell division. Along the way have come explorations of such issues as the extent to which development (...) is driven by hereditary determination rather than flexible regulation in response to changing conditions. Some researchers have focused specifically on examining the capacity for regeneration in response to injury or loss, or on the extent to which parts are self-organizing individually rather than determined segments of a whole. This paper introduces the historical study of development. (shrink)

This article intervenes in recent formalist and ecocritical debates, drawing on the philosophy of Charles Darwin and Édouard Glissant to develop an ecopoetic theory of relational form. Gathering perspectives from ecocriticism and new materialism, literary criticism and comparative literature, the history and philosophy of science, postcolonial theory, critical race theory, and Black studies, it reads form as an interdisciplinary object that is part of the world, rather than an imposed feature of human language or perception. In this way, it produces (...) a relational theory of form that is not hylomorphic or defined through the relation between form and content but, rather, is defined by the relation between a content and extant and, so, an interaction of relation and repetition. Drawing on the history of ecological science, it further explores how forms combine, how they amplify and interfere with each other, and how they support relations of harm and care. Finally, it uses this ecopoetic theory of form to read the histories of racial violence and migration in Matthew Arnold’s “Dover Beach” (1867) and Helen Oyeyemi’s White Is for Witching (2009). (shrink)

The ArgumentThe claim that Jan Swammerdam's empirical research did not support his theory of biological preformation is shown to rest on a notion of evidence narrower than that used by many seventeenth-century natural philosophers. The principles of evidence behind the use of mechanical models are developed. It is then shown that the Cartesian theory of biological reproduction and embryology failed to gain acceptance because it did not meet the evidential requirements of these principles. The problems in this and other mechanistic (...) theories prior to Swammerdam are found to arise from certain difficulties and tensions in the mechanical conception of nature, which Swammerdam's theory is able to resolve. The relation between Swammerdam's empirical research and his theory is examined and shown to satisfy the required notion of evidence.Leibniz' puzzling appeals to Swammerdam's research in support of his metaphysical doctrine of the spontaneous development of individual substances are then examined and shown to fall within the parameters of the notion of evidence. (shrink)

In his accounts of plant and animal generation Pierre Gassendi offers a mechanist story of how organisms create offspring to whom they pass on their traits. Development of the new organism is directed by a material “soul” or animula bearing ontogenetic information. Where reproduction is sexual, two sets of material semina and corresponding animulae meet and jointly determine the division, differentiation, and development of matter in the new organism. The determination of inherited traits requires a means of combining or choosing (...) among each parent's contributions, and towards this end, Gassendi outlines the nature of competition and dominance among animulae. Unlike his fellow mechanists, Gassendi can extend his mechanism to his heredity account, because his proposed vehicle for ontogenetic transmission is material. That proposal in turn relies on his atomist hypothesis. The relative uniformity of atoms allows animulae to operate equivalently across different modes of generation, spontaneous or otherwise. Further, his molecular model of atomic structures allows a material means of storing ontogenetic information received from the souls of parent organisms. These accounts—flawed and sketchy—unsurprisingly fail to specify how hereditary information might be borne physically, and in any case do not meet Gassendi's own empiricist standards. Yet this generation theory with pretensions to a materialist mechanism establishes Gassendi's firm commitment to a unity of the sciences through an atomist ontology that underlies all physical phenomena, including the organic. (shrink)

Malebranche is both an occasionalist and an advocate of the preformationist theory of generation. One might expect this given that he is a mechanist: passive matter cannot be the source of its own motion and so requires God to move it (occasionalism); and such matter, moving according to a few simple laws of motion, could never fashion something as complex as a living being, and so organisms must be fashioned by God at Creation (preformationism). This expectation finds a challenge in (...) Kant's depiction of the relation between causation and generation. According to Kant, preformation is the generation theory one would expect the advocate of the pre-established harmony to endorse, while the occasionalist would endorse a theory whereby God directly forms the organism upon every insemination. I make sense of Malebranche's position in light of Kant's suggestion by examining the relation Malebranche sees between science and metaphysics, the roles that he believes empirical investigations and final causes have in scientific practice and explanation, and the role of the supernatural in Malebranche's philosophy. (shrink)

This is an epistemologically-driven history of the concept of evolution. Starting from its inception, this work will follow the development of this pregnant concept. However, in contradistinction to previous attempts, the objective will not be the identification of the different meanings it adopted through history, but conversely, it will let the concept to be unfolded, to be explicated and to express its own inner potentialities. The underlying thesis of the present work is, therefore, that the path that leads to the (...) development of the concept of evolution is the path that studies the possibilities of the evolution of concepts, and that the historical reconstruction of its conceptual trajectory will shed light into potential and unexploited possibilities. This methodology will provide useful tools and resources for future developments of the concept. For example, it will define the concept of transmutation as a different conceptual trajectory deviating from the one corresponding to evolution, at the onset of the 19th century. Moreover, epigenesis will not be the opposing concept to evolution, but only to simultaneous and instantaneous generation. It will demonstrate that every important system of epigenesis drew upon some kind of formative power to explain development. More importantly, it will show that the problem of preformation cannot be overlooked, and that some kind of virtual preformation must be considered in order to address the problems of generation and development. (shrink)