This paper argues that success in the struggle for regional integration hinges foremost on the degree of heterogeneity among regional states. Regional organizations therefore must consider how to optimize their leverage to forge convergence that will foster agreement and cooperation. To do so,...

Containing the COVID-19 pandemic will confer global benefits that greatly exceed the costs, but effective solutions require the redistribution of vaccines, technology, and other scarce resources from high-income to low-income countries. The United States has played a central role in coordinating...