Final answer:
Alfred Mahan's book, The Influence of Sea Power Upon History, supported the idea of Manifest Destiny by advocating for a strong navy, expansion of territories, and control over strategic trade routes.
Step-by-step explanation:
In 1890, Alfred Mahan published his book The Influence of Sea Power Upon History, which argued that naval power was crucial to a nation's greatness. Mahan's ideas heavily influenced American policymakers and contributed to the concept of Manifest Destiny.
Mahan recommended acquiring Hawaii, building a canal across Central America, and creating coaling stations in the Caribbean and Asia to expand and modernize the US fleet. These suggestions align with the idea of Manifest Destiny, as they promote American expansion and influence in the Pacific and Caribbean regions.
By developing a strong navy with global reach, Mahan's thesis supported the idea of Manifest Destiny by bolstering American ambitions for expansion and control over strategic territories and trade routes.