Alfred Thayer Mahan is the kind of historical figure who proves that fame and aptitude are not always bedfellows. By the late nineteenth century, he was the undisputed authority on naval history, the man who coined the term “sea power” and lent it enough gravitas to send Congress scuttling toward new battleships. His seminal work, The Influence of Sea Power Upon History, 1660–1783, was the TED Talk of its era—if TED Talks were 500-page treatises on naval strategy, dense with charts, footnotes, and historical examples. Mahan became the intellectual godfather of America’s rise as a global maritime force.