Nationalism
The time period 1800 to 1840 was a time of great nationalism and expansionism in the United States. The national feelings were caused by political, economic, and intellectual domestic developments in the US. Strong national feelings convinced Americans that their nation was destined to be great. This in turn affected the governments' domestic policies and allowed Manifest Destiny to take place.
When America entered the war of 1812, its economy was mainly based on local trade and agriculture. However, the overseas trade of goods from America was increasing. …
