In 1914, many Americans believed that the Monroe Doctrine encouraged them to follow a policy of "protectionism", since this doctrine stated that any further efforts by European nations to colonize the Americas would lead to an American retaliation.
The large land was isolated from the rest of the world by deserts oceans and mountains which enabled them to develop independently from other civilizations
One issue was religion disagreements. This divided them and affected the people greatly
To calculate the population density, you will divide the population by the size of the area. Thus, Population Density = Number of People/Land Area. The unit of land area should be square miles or square kilometers. You can use square feet or meters if you are finding the density of a smallish space.
