The article of record as published may be found at https://doi.org/10.1080/01495933.2018.1526566.This article assesses the relevance of US seapower in the contemporary security environment. This paper builds upon a rich literature on sea power, strategy, and maritime operations to assess recent factors and emerging geostrategic dynamics that are likely to affect American maritime strategy, while keeping sight of the principles that will endure regardless of shifting domestic and international politics. It places the application of sea power in an historic and strategic context to inform the policy choices that confront the administration in wielding elements of national power to further U.S. interests around the world. These issues come to ...