The distinct moral importance of acting together

This review essay engages with Garrett Cullity's argument that there is a fundamental moral norm of cooperation, as articulated in Concern, Respect, & Cooperation (2018). That is to say that there is moral reason to participate in collective endeavours that cannot be reduced to other moral reasons like promoting welfare. If this is plausible, all the better for solving collective action dilemmas like climate change. But how should we understand a reason of participation? I supplement Cullity's own account by appealing to the notion of 'team reasoning' in game theory. Even if not an adequate notion of rationality, adopting the team stancederiving individual reason to act from what a group may together achievemay well have distinct moral importance.