Abstract

In philosophical action theory there is a wide agreement that intentions, often understood in terms of plans, play a major role in the deliberation of rational agents. Planning accounts of rational agency challenge game- and decision-theoretical accounts in that they allow for rationality of actions that do not necessarily maximize expected utility but instead aim at satisfying long-term goals. Another challenge for game-theoretical understanding of rational agency has recently been put forth by the theory of team reasoning in which the agents select their actions by doing their parts in the collective action that is best for the group. Both planning and team reasoning can be seen as instances of a similar type of reasoning in which actions are selected on the basis of an evaluation of a larger unit than an individual’s momentary act. In recent theories of collective agency, both planning and team reasoning have been defended against orthodox game theory, but, interestingly, by different authors: Raimo Tuomela has defended team reasoning in his theory of group agency, but he ignores temporally extended planning in this context. Michael Bratman has extended his theory of planning to the case of shared agency, but he does not seem to see a role for team reasoning in understanding shared intentional activities. In this paper, we argue that both accounts suffer from this one-sidedness. We aim to combine the main insights of Tuomela’s we-mode approach and Bratman’s planning approach into a fruitful synthesis that we think is necessary for understanding the nature of group agency.