In the twenty-first century, the Indo-Pacific has emerged as a crucial geostrategic region for trade, investment, energy supplies, cooperation, and competition. It presents complex maritime security challenges and interlocking economic interests that require the development of an overarching multilateral security framework. This volume develops common approaches by focusing on geopolitical challenges, transnational security concerns, and multilateral institution-building and cooperation. The chapters, written by practitioners, diplomats, policymakers, and scholars from the three major powers discussed (United States, China, India) explain the opportunities and risks in the Indo-Pacific region and identify specific naval measures needed to enhance maritime security in the region.