University of Tehran Published jointly with Iranian World Studies Association Journal of World Sociopolitical Studies 2588-3119 10 2 2026 04 01 Opportunities and Challenges of Regional Integration in the Americas and the Middle East: Comparative Dynamics of the Organization of American States and the League of Arab States 605 657 106084 10.22059/wsps.2026.394674.1519 EN Elaheh Nourigholamizadeh Assistant Professor of American Studies, University of Tehran, Tehran, Iran Mahdi Jarban M.A. in Latin American Studies, University of Tehran, Tehran, Iran Journal Article 2025 05 24 Regionalism, a phenomenon much older than globalization, has long promoted the individual and collective interests of countries. Accordingly, American and Middle Eastern nations have sought to advance their interests within integration frameworks such as the Organization of American States (OAS) and the League of Arab States (LAS). In this context, Ernst Haas’s neofunctionalist theory provides a useful lens to examine these blocs, focusing on four key categories: supranationality, the shift in elite loyalties, the collective decision-making process, and most importantly, the spillover effect. This study applies the neofunctionalist approach and uses qualitative content analysis to examine collected data from both above-mentioned organizations. By reviewing internal regulations, resolutions, and the contemporary political contexts of member countries, the research compares the OAS and LAS to highlight their similarities and differences. The study finds that while the LAS struggles with foreign interference and internal rivalries among members competing for leadership in Arabism, the OAS is shaped by the hegemonic dominance of the United States and the ideological polarization across the Americas, where conservative and progressive governments alternate in power. The dynamic traps the continent in a vicious cycle that must be broken. https://wsps.ut.ac.ir/article_106084_353a6d55f8707219e5c05e8904ce9e1d.pdf