Descartes on fermentation in digestion: iatromechanism, analogy and teleology

Fermentation is a cornerstone phenomenon in Cartesian physiology, accounting for processes such as digestion or blood formation. I argue that the previously unrecognized conceptual tension between the terms ‘fermentation’ and ‘concoction’ reflects Descartes's efforts towards a novel, more thoroughly mechanistic theory of physiology, set up against both Galenism and chymistry. Similarities with chymistry as regards fermentation turn out either epistemologically superficial, or based on shared earlier sources. Descartes tentatively employs ‘fermentation’ as a less teleological alternative to ‘concoction’, later renouncing the explicit use of the term, possibly to avoid chymical overtones. However, his continued use of analogies with fermentative processes in the natural world and in winemaking, coupled with a strong ontological commitment (the stance that the physiological processes are actual fermentations), leads to a reintroduction of natural teleology in his medical system, which I argue may be understood in an Aristotelian sense of ‘simple necessity’. The paper reveals a more nuanced account of Cartesian fermentative medicine, delineating some of its tensions with regard to chymistry as they play out in the dynamics of fermentation and concoction, and linking the analogies to fermentation processes to the difficulties in erasing teleology altogether.

Perfect Duties to Oneself Merely as a Moral Being

This chapter considers Kant’s arguments for the claims that lying, miserliness, and servility are violations of duties to oneself. Although his argument against lying appeals to natural teleology, namely, that the purpose of one’s power of communication is to accurately convey one’s thoughts, this chapter argues that the argument is fallacious and that the wrongness of lying is better explained by relating it to the duties of conscience and self-scrutiny—duties partly constitutive of the duty of moral self-perfection. In addressing the duty to avoid miserliness, the chapter considers how Kant’s conception of virtue and vice contrasts with his understanding of the Aristotelian doctrine of the mean. The chapter continues with the duty to avoid servility and its relation to Kant’s conception of ‘true noble pride’ to be found in the earlier lecture notes on ethics. The chapter concludes with a brief discussion of Kant’s so-called moral rigorism.

Everything in Nature is in Intellect: Forms and Natural Teleology in Ennead 6.2.21 (and elsewhere)

According to a straightforward reading of Enn. 6.2.21, all principles (logoi) in nature have their origin in corresponding features of a divine Intellect. But interpreters have often advocated more restricted readings of Intellect’s contents. These restricted readings are based in part on other textual evidence, and in part on the concern that a more expansive reading would require Intellect to think objects that are of trivial value (‘the value problem’) or whose purposes depend upon facts about sensible reality to which it has no access (‘the teleology problem’). I argue that restricted readings are not well supported, and that Plotinus is committed to his more expansive conception of Intellect’s contents by his understanding of Plato’s paradeigmatism.

Projection or encounter? Investigating Hans Jonas’ case for natural teleology

This article discusses Hans Jonas’ argument for teleology in living organisms, in light of recently raised concerns over enactivism’s “Jonasian turn.” Drawing on textual resources rarely discussed in contemporary enactivist literature on Jonas’ philosophy, we reconstruct five core ideas of his thinking: 1) That natural science’s rejection of teleology is methodological rather than ontological, and thus not a proof of its non-existence; 2) that denial of the reality of teleology amounts to a performative self-contradiction; 3) that the fact of evolution makes it implausible that only humans actualize purpose; 4) that the concept of metabolism delimits and gestures towards beings performing purposive activity; and 5) that concrete encounters with living organisms are indispensable for the judgment that they are purposive. Lastly, we draw attention to how Jonas’ understanding of teleology and inwardness in nonhuman life in terms of degrees of identity with human life poses a problem for his view. In this way, we hope to clarify what Jonas, as an important source of inspiration for the enactivist project, is proposing.

Unseating the Craftsman: Natural Efficient Cause in Aristotle's Craft Analogy

In this essay, I respond to a problem raised by Sarah Broadie in her 1987 article “Nature, Craft and Phronesis in Aristotle.” Broadie analyzes Aristotle’s famous craft analogy for natural causation in order to determine whether or not it requires importing a psychological dimension to natural teleology. She argues that it is possible to make sense of the analogy without psychology, but that the tradeoff is a conception of craft so thoroughly de-psychologized that it is rendered unrecognizable, perhaps even incoherent as a referent. I dispute this suggestion and argue, rather, that Aristotle’s insistence on removing psychology from the craft side of the analogy points to his prioritization of techne itself, rather than any particular craftsman, as primary efficient agent. The lack of psychology that characterizes a techne ensures stability and reliability in the causal process that could not be guaranteed by the idiosyncratic psychologies of various craftspeople. The same kind of stability and reliability belong to nature as an efficient cause, forming the basis of the comparison between craft and natural teleology. It is therefore the craft, not the craftsman, that must stand as analog to nature. I demonstrate the value of this revision by applying the analogy to case of natural teleology: reproduction as depicted in Aristotle’s Generation of Animals. The result is a reading of Aristotle’s analogies that can assuage Broadie’s concerns and allow for a natural thing’s own nature to more fully inhabit its intended role as an inner source of change.

The Teleological Argument in Kant’s Groundwork for the Metaphysics of Morals

The first section of Kant’s Groundwork for the Metaphysics of Morals contains a teleological argument, the aim of which is to show that the natural purpose of human reason lies not in securing happiness but in morality. While the teleological argument is widely considered to be digressive and unconvincing in the secondary literature, in this article I attempt to show that the argument is neither digressive nor unconvincing. I argue that it fulfills an important synthetic task in the Groundwork (even if in a preliminary manner), that it is consistent with Kant’s views on natural teleology at the time, and that the criticism of happiness contained therein is as convincing as Kant’s criticism of happiness in the rest of the treatise.

On what a theory of natural law is supposed to be

A theory may properly be called a theory of natural law, if either it functions as such a theory is expected to function; or it has the expected content; or it is a plausible interpretation of a theory generally acknowledged to be in the tradition of natural law. It functions as such a theory if it supports appeals to natural law intended to ‘contextualize’ human law. It has the expected content, if it adverts to providential, natural teleology as the basis for a law given to us prior to convention. It would clearly be located in the tradition, and rightly accounted as such a theory, if it were a plausible interpretation of Aquinas’ Treatise on Law, which is the locus classicus for the philosophical treatment of natural law. But the ‘New Natural Law,’ first expounded in Natural Law and Natural Rights (NLNR) of John Finnis, meets none of these criteria. NLNR seems best construed, then, as a contribution to the «law and morality » debate, not a theory of natural law. It gives merely another ‘method of ethics’ along with the many others put forward in the 20th c. If so, the philosophical work needed for a persuasive, contemporary revival of natural law still remains to be done.