What unites states and other global actors around a shared governance project? How does the group—what I will call an “international community”—coalesce and stay engaged in the enterprise? A frequent assumption is that an international community is cemented by its members’ commonalities and depleted by their intractable disagreements. This article critiques that assumption and presents, as an alternative, a theory that accounts for the combined integration and discord that actually characterize most global governance associations. I argue that conflict, especially conflict that manifests in law, is not necessarily corrosive to an international community. To the contrary, it often is a unifying force that helps constitute and fortify the com...