This is true, not having a navy has shown itself to be a weakness of many nations/civilizations in the past. And there are also good reasons why this is so. Not having a navy strongly impacts a civilizations ability to maneuver around certain points and go around them. It also limits the ability to trade with other natons. Not to mention the additional value of having the firepower of ships (those that had cannons later on at least).
Answer:
Squanto taught the Pilgrims how to grow the "three sisters": corn, beans, and squash. Although the Pilgrims had never eaten these foods before, it was what grew well in the rocky soil of their new homeland.
Real GDP per capita for the United States is calculated by dividing real GDP by the number of people living in the country.
