Why was Alfred T Mahan's book Important?

Alfred T. Mahan's book, "The Influence of Sea Power upon History," was important because it argued that a strong navy was crucial to a nation's security and economic prosperity. His ideas influenced naval strategy and policy in various countries, including the United States and Great Britain, shaping their military development and international relations. Mahan's work also emphasized the significance of naval power in establishing and maintaining global influence and control.