Imperialism is, by definition, the extension of rule or influence by one government, nation or society over another; manifest destiny is the belief held by many Americans in the 1840s that the United States was "destined" to expand across the continent. This belief of "destined expansion" was nothing new to America's leaders for their vision of the United States when they first established it was that of a nation that stretched from the Atlantic to the Pacific. The American people themselves had underlying reasons for their imperialistic actions as well, mostly economic and political. …
