Abstract

In this chapter, I examine the concept of vulnerability as a complex constitutive feature of human agency and argue that it is both a constraint on and a resource for practical reasoning. When discussed as an ontological feature of human agency, vulnerability is primarily understood as an aspect of embodiment, which is problematic in different respects. First, in relation to the situatedness of human agency, vulnerability indicates that human agents are subjected to contextual contingencies. Second, in relation to temporality, vulnerability indicates that agents act in time and under the pressure of time. They are finite and produce finite and perishable actions, even though the longlasting effects of an action may survive the action itself. Third, in relation to corporal feature of agency, vulnerability is associated to suffering and frailty, insofar as bodily needs and desires represent both springs of and hindrances to rational action. Finally, in relation to the social nature of human animals, vulnerability indicates the susceptibility to be harmed, obstructed, undercut or manipulated by other agents These varieties of vulnerability are constituive features of human agency, which cannot be removed without removing what is peculiar and specific to human agency. Theories of practical reason are primarily concerned with constitutive vulnerability as a defect, and presume to offer normative guidance by adopting an idealized account of rational agency, which corrects or merely cancels the defective features of human agency. By contrast, theories of bounded rationality understand practical reasoning instrumentally, and thus are concerned with cognitive limitations of practical rationality, in particular with partial and perspectival information. However, the notion of “partial information” is inadequate to capture the complexities and significance of vulnerability, even in its restricted cognitive sense, which has to do with the agent’s situatedness. On the view I propose, instead, vulnerability is declined as a constitutive constraint on practical reasoning. Susceptibility to time constraints makes sense of the agents’ engagement in action and of their distinctive deliberative perspective. Susceptibility to bodily needs and desires tracks the normative relation between motivations and reasons for action, as well as the corporal roots of the agents’ efficacy in a perceived context. Susceptibility to others makes possible to broaden the scope and the modes of individual agency, by way of inter-action and shared agency. Rather than the source of problems and issues for rational agency, I take vulnerability to name the cluster of constitutive constraints that shape practical reasoning. According to the distinctive variety of Kantian constructivism I defend, practical reason is incomplete, rather than imperfect or defective. The completion of practical reason does not aim to correct or dissolve vulnerability, but deploys vulnerability as a resource to build up autonomy. This view accounts for autonomy as a normative relation among vulnerable agents, which develops in time.