Alfred Thayer Mahan (1840-1914) conceived the idea that sea power was the key to a strong foreign policy. His thinking is behind the building and strengthening of the US Navy, dominating American naval planning. He was so influential that his ideas led to a race among powers to have powerful navies in the 19th and the 20th centuries.
In my opinion, america as a country is good at making money. However, american people consume junk food or frozen food. And meats that was packed 2, 3 weeks ago. Meanwhile, people in other countries eat fresh foods.
most of the oil in Aisa/Europe comes from the middle east and all navies ran on oil so if they lost oil they would be vulnerable from western and eastern enemies