Abstract

The notion of a formative power is one of the most obscure in Kant’s theory of biology. In section I of the paper, I will provide a list of all passages in which Kant uses the term, claiming that the older meaning of ‘formative power’ in Kant’s writings is an epistemological one, whereas the biological meaning of the term appears not before the mid-1780s. I will present and discuss some of these passages in closer detail, and will give a precise interpretation of the most central passage in §65 of Kant's CPJ (5:374.21–6). I will defend the view that, for Kant, the formative power is an immaterial and intrinsic natural power of the organism that belongs to an account of final causation. As a cause, it does not generate the form and the matter, or the matter of organisms, but only the end-directed, purposive form of the matter of an organism. Reading the formative power as form-giving allows for a more careful analysis of Kant’s famous tree example in §64, which I will investigate in section II. The self-generation of a tree with regards to its species, as an individual and with regards to its parts, does not imply the generation of the form and the matter of a tree, or the generation of its matter, but only the causation of the purposive form of the matter of a tree. In section III, I will briefly outline consequences of my interpretation for a placement of Kant’s position among constitutive and regulative theological, and philosophical accounts of organic generation. The fact that the formative power as a form-giving capacity in the organism is a natural epigenetic power does not rule out a supernatural preformistic interpretation of the creation of the matter, and also not a supernatural creation of the formative power. Nature's formative power can be read as a secondary cause that supports God’s creation as a primary cause, and Kant’s position can be understood as mediating between philosophy and a constitutive theology in the pre-critical, and philosophy and a regulative theology in the critical period.