Mahan's Theory of Sea Power: Why America's Command of the Sea Is Fragmenting

The US Navy just fought a decisive naval battle, and Mahan's own theory says that it should have done more than just win the war; it should have retained command of the seas thereafter. It didn't...and the reason why goes back 136 years. SUBSCRIBE TO MY SUBSTACK: https://mackinderinsights.substack.co... Earlier this year, the US destroyed Iran's entire operational fleet within about a week, a clean, decisive engagement, exactly the kind Alfred Thayer Mahan spent his career arguing was the whole point of naval power. And the Strait of Hormuz still didn't reopen on American terms. This isn't a new problem dressed up as one: showing up with overwhelming naval force to protect the sea lanes goes back to 1801, and the Barbary Wars, and it's worked, more or less, for over two centuries. This video goes back to the source of the theory that explains why it stopped working this time, and finds a second theorist, largely forgotten, who saw the gap coming over a hundred years ago. I trace Alfred Thayer Mahan's The Influence of Sea Power Upon History from the Naval War College lecture hall where it was written through the six conditions and three requirements that actually make up his theory of sea power, most of which get flattened into "big navy equals global power" by people who've never read past the first chapter. Then I run the United States through Mahan's own framework as it stands today, before applying all of it directly to what happened in the Strait of Hormuz in 2026, and to Julian Corbett, the British theorist whose 1911 rebuttal to Mahan turns out to explain the present far better than Mahan's own doctrine does. In this video, we get into the details: Who Alfred Thayer Mahan was, and how an unremarkable naval career led to the most influential naval theory in modern history The three-link commercial chain: production, shipping and colonies, that most people miss entirely underneath Mahan's reputation as a battleship theorist Mahan's six conditions for sea power, and the Britain-versus-France comparison that explains why geography alone was never the whole story Why Julian Corbett's 1911 rebuttal to Mahan's decisive-battle doctrine matters more today than at any point since it was written How the United States stacks up against Mahan's own conditions today, and where a century of shipbuilding dominance has quietly eroded What actually happened during the blockade of the Strait of Hormuz, as read directly through Mahan's own doctrine of command of the sea Why are the Houthis, Indonesia, and Japan all running versions of the same geographic leverage against a fleet none of them could ever defeat symmetrically ──────────────────── CHAPTERS 0:00 — Intro 3:14 — Who was Alfred Thayer Mahan? 6:50 — Mahan's Theory of Sea Power 17:18 — How Mahan's Theory Stacks up today 25:00 — The Case Study: Hormuz 29:47 — The bigger pattern ──────────────────── KEY THINKERS & SOURCES REFERENCED Alfred Thayer Mahan: "The Influence of Sea Power Upon History, 1660–1783" (1890) Julian Corbett: "Some Principles of Maritime Strategy" (1911) Nicholas Spykman: America's Strategy in World Politics: The United States and the Balance of Power ──────────────────── #Geopolitics #Mahan #NavalHistory #USNavy #SeaPower #Iran #Hormuz #MackinderInsights