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

Abstract

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.