Rethinking Ocean Diplomacy: The Geopolitics of Institutional Asymmetry and Adaptation continues Artur Victoria's published exploration of power, institutions and the ocean. Building on The Geopolitics of Institutional Asymmetry, The Invisible Ocean and Maritime Chokepoints, it turns towards a fundamental question: how do international commitments become effective action when authority, knowledge, resources and enforcement capabilities are distributed unequally?The book examines diplomacy beyond negotiations and signatures, following the institutional relationships through which agreements acquire practical meaning. Fisheries, seabed resources, submarine infrastructure, climate change and marine biodiversity reveal how cooperation depends on contributions that no single participant can command. A chapter on the BBNJ Agreement brings this inquiry into the emerging framework for protecting biodiversity beyond national jurisdiction.The author distinguishes insufficient capability from political refusal and commitments whose ambition falls short of their stated purposes. Adaptation consequently requires more than reform: it demands evidence, accountable decisions and an understanding of what institutions can change.Developed within the intellectual concerns of the Ocean Geopolitics Centre, this volume offers scholars, diplomats, institutional leaders and maritime practitioners a connected interpretation of ocean governance. It extends the author's earlier work by examining how geopolitical inequalities shape cooperation, implementation and the distribution of benefits across a shared ocean.