Abstract Arabian Peninsula politics are in a period of enormous transformation. In the context of a new generation of rulers seeking legitimacy through ambitious foreign policy regimes, shifting relations with Iran, the 2017–2021 Qatar crisis, and ongoing conflict in Yemen, this article introduces the July 2021 special section of International Affairs, which examines how the Arab states of the Gulf are adapting to these new realities. Questions addressed include: how have transnational identities been manipulated by states during regional disputes? How have oil and gas revenues been redirected to build up religious soft power and enhance state branding efforts? In an increasingly authoritarian world, how has transnational repression interacted with politicized diasporas to impact opposition mobilization? And, how do disputes over airspace help us understand the process of sovereignty-building in the modern Middle East? In pursuing these questions, the special section challenges the particularism still apparent in many analyses of the Gulf region, and seeks to bridge International Relations with fieldwork-based Gulf studies. The research presented in the section highlights new findings within contemporary research on the Gulf that will be of interest both to policy-makers and others seeking to understand the long-term sustainability and balance of power in this critical region.