Anscombe, joint action, and the guise of the good

Discussion of Anscombean joint action has thus far focused primarily on the possibility of joint practical knowledge. In this paper, I raise an under-recognised problem for theorists of Anscombean joint action: how can we make sense of the idea that action is taken under the guide of the good in cases of joint action? Considerable collaboration seems possible in the absence of any shared characterisation of the good to be achieved in thus acting. I sketch some straightforward responses to this problem and suggest that they all face problems, before finally briefly gesturing towards a more promising avenue of response.