This volume collects and combines research on regional integration projects beyond Europe and in the Global South across a wide range of policy issues. Given the plurality and diversity of regional organisations, there is a growing need to systematically analyse, assess and explain the performance of regionalism. Acknowledging the considerable differences in settings, institutional design, and politico-economic environment of regional organisations, the expert contributors move beyond EU-centric notions to offer a profound overview and propose new dimensions of innovative performance research. Systematic and in-depth research from Eurasia, Asia, Africa, and Latin America on organisations such as the Eurasian Economic Union, South Asian Association for Regional Cooperation, Indian Ocean Commission, Shanghai Cooperation Organisation, African Union, and the Organisation of American States, enables us to identify the conditions and determinants that shape performance across regions, actors, policy areas, and settings. The book provides readily accessible, important, and novel information to students and scholars of political science, international relations, EU and European studies, peace and conflict studies, comparative regionalism, interregional and inter-organizational studies, area studies, and persons interested in specific policy fields such as trade, security, or development policy.