Shared agency is a distinctive kind of sociality that involves interdependent planning, practical reasoning, and action between participants. Philosophical reflection suggests that agents engage in this form of sociality when a special structure of interrelated psychological attitudes exists between them, a set of attitudes that constitutes a collective intention. I defend a new way to understand collective intention as a combination of individual conditional intentions. Revising an initial statement of the conditional intention account in response to several challenges leads to (...) a specification of the properties these intentions need to have in order to be genuine commitments. I then show how a structure of conditional intentions with these properties settles a collection of agents on engaging in social interactions that display all the features typically associated with shared agency. (shrink)

Do participants in shared activity have mutual obligations to do their bit? This article shows this question has no one-size-fits-all answer and offers a pluralist account of the normativity of shared agency. The first part argues obligations to do one's bit have three degrees of involvement in shared activity. Such obligations might, obviously, bolster co-participants’ resolve to act as planned (degree 1). Less obviously, there also are higher and lower degrees of involvement. Obligations to do one's bit might provide our (...) agency-pooling mechanism. When they do, we act together by virtue of satisfying them (degree 2). Conversely, some shared activities involve no obligation (degree 0). In the second part, I argue shared agency theory is best served by a non-moralistic conception of obligation, one on which co-participants’ obligations need be neither strict-performance obligations, nor directed ones. Overall, my arguments suggest that we can choose how to coordinate normatively our shared activities. (shrink)

What is involved in acting together with others? Most shared agency theorists endorse the Shared Intention Thesis, i.e., the claim that shared agency necessarily involves shared intentions. This article dissents from this orthodoxy and offers a minimalist account of shared agency—one where parties to shared activities need not form rich webs of interrelated psychological states. My account has two main components: a conceptual analysis of shared agency in terms of the notion of plan, and an explanation of undertheorized agency‐sharing mechanisms. (...) My analysis states that we act together just in case our activities conform to a plan and that plan figures in an explanation of our activities’ joint conformity to it. To sloganize:shared activity is plan‐coordinated activity. Sometimes, plan‐coordination goes by way of shared intentions. However, besides shared intentions, there are at least two additional families of agency‐sharing mechanisms. The first features a central planner who determines the content of a plan and attributes the different parts of that plan to a collection of agents. The second does away with the planner and involves a roughly Darwinian selection of patterns of activity. Both families of mechanisms enable us to act together even in the absence of shared intentions. (shrink)

This entry surveys main accounts of collective intentions.

Pure quality of will theories claim that ‘the ultimate object’ of our responsibility responses (i.e., praise and blame) is the quality of our will. Any such theory is false—or so I argue. There is a second dimension of (moral) responsibility, independent of quality of will, that our responsibility responses track and take as their object—namely, how adroitly we are able to translate our will into action; I call this competence of will. I offer a conjectural explanation of the two dimensions (...) of (moral) responsibility: it matters to us that people actually perform adequately well because of how much it matters to us that we are able to live and work together successfully. (shrink)