Does the concept of political friendship make sense, and does cultivating political friendship among peoples strengthen universal peace? This article provides an Aristotelian account of political friendship as distinct from but analogous to personal friendship. Political friendships, founded on mutual recognition and respect, are characterized by consensual agreement about the fundamental terms of cooperation. While promoting such political friendship at the global level would be a measure to strengthen universal peace, another form of friendship, politicized friendship, is to be avoided, (...) as it is driven by rivalrous rather than equitable self-interest, and breeds political enmity and strife. Taking Aristotle's insights about political friendship to the global arena, the article considers Rawlsian peoples to be suitable subjects for political friendship. The duty of assistance and the duty to oppose outlaw states illuminate demands of political friendship among Rawlsian peoples that entail equity, power sharing and even sacrifice. (shrink)