Dear all,

The School of Liberal Arts at the University of Wollongong would like to invite 
you to the next Agora seminar, to be held on Thursday, August 13. Details are 
here<https://sola-events.github.io/agora/aberoth.html> and below. All most 
welcome.


Abe Roth     

Ohio State University

A puzzle about partiality and shared ends

13 August 2026 · 3.30–5pm · 20-4

The University of Wollongong (Keiraville campus)


Abstract

Some reasons of partiality in personal relationships are constitutive of the 
relationship. Part of what it is to be friends, for example, is to have a 
special reason to be concerned with each other’s wellbeing or interests. This 
is over and above an impartial reason for concern, which one may afford anyone: 
it’s because he’s my friend that I’m more concerned with helping him than an 
equally deserving stranger.


Other reasons of partiality are mediated by the relationship but not 
constitutive of it. Friends will typically share concerns about things quite 
outside of themselves or their relationship. Because you are friends with 
someone, you will have special reasons of partiality that favor acting for an 
end of theirs rather than some equally worthy end of a stranger. Amongst the 
most important cases are those where you take up an end which is, for the 
friend, non-instrumental or final – e.g. some political or environmental cause.


There appears to be a genuine puzzle reconciling (1) the possibility of sharing 
and acting for a friend’s non-instrumental end, with (2) this being an instance 
of you having and acting for a reason of partiality. She cares about the cause 
for its own sake, whereas your concern insofar as it is a reason of partiality 
is grounded in your relationship with her. The problem is that the respective 
reasons you and the friend have for pursuing the friend’s end are too divergent 
to count as genuinely sharing the end.


Solving this puzzle will have important implications for our understanding of 
agency. I will argue that our ability to act on such reasons of partiality is 
facilitated by – arguably requires – engaging in a distinctive form of joint 
agency that exhibits practical intimacy. This involves a form of interpersonal 
authority that underwrites one’s entitlement to another’s reasons, and this 
entitlement is crucial for the sharing of ends in personal relationships such 
as friendship.


Bio

Abe Roth is a Professor in the Philosophy Department at Ohio State University. 
He received a Ph.D. from Princeton in 1996, and was on the faculty in 
Philosophy at UCLA from 1998-2002, and at the University of Illinois at Chicago 
from 2002-2006. He works mainly in the philosophy of action (especially shared 
agency and collective intentionality), and related areas of epistemology, mind, 
moral psychology, ethics, and social ontology. He has published in various 
places, including The Philosophical Review, Noûs, Ethics, Oxford Studies in 
Agency and Responsibility, Philosophy and Phenomenological Research, and 
Philosophical Studies.


Best wishes,

The School of Liberal Arts

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