Aristotle devotes Nicomachean Ethics IX.6 to the notion of homonoia. Commonly translated as ‘concord’ or ‘like-mindedness’, homonoia is a central concept in Aristotle’s account of political friendship. I argue in this paper that Aristotle’s concept of homonoia cannot be perspicuously rendered as ‘like-mindedness’ or its cognates. For homonoia does not just involve the sameness of belief or opinion: it involves both shared commitments to the same goals and collective action aimed at realizing those goals, and cognates of ‘like-mindedness’ do not (...) bring this activity-involving component of homonoia clearly into relief. I attempt to capture this activity-involving component by presenting a novel interpretation of Aristotelian homonoia as joint commitment. My interpretation of homonoia as joint commitment offers solutions to two puzzles associated with NE IX.6. First, it establishes the function of NE IX.6 within Aristotle’s broader theory of friendship. Second, it clarifies the proper relationship between homonoia and political friendship. (shrink)