Did the Concept of Manifest Destiny Really Influence the Outbreak with Mexican-American War Essay

Topic: Did the concept of Manifest Destiny really influence the outbreak with Mexican-American war?

Introduction
    Why we have to make a research about Manifest Destiny? Were the American people agreed to expansionism? Because the Manifest Destiny not only influence c or 19th century also Impact the whole 20th century United States political view until today. Mexican-American War is a big event in the 19th century, in which the concept of Manifest Destiny was related with war.
    The Mexican-American War was not only for increased territory, but also a symbol of America's racial misunderstanding. Some White people have the superiority with themselves.[1] They took Mexican people’s land as Manifest Destiny, above all moral and law. Many Americans believe that God give them the power and duty to expand territory, strengthen the United States. The motivation of United States launched this war is a debatable subject.

The origin and influence
    The term Manifest Destiny was popular in the 19th century, some Americans believed they had the destiny to expand American continent Territory, from the Atlantic coast to Pacific Ocean. The ideal of territory expansion is already had before the American Independence, but in 1845, The United States Magazine and Democratic Review editor John O'Sullivan published an essay “Annexation”.
    “…our manifest destiny to overspread the continent allotted by Providence for the free development of our yearly multiplying millions”[2]
    This essay reveal John O'Sullivan claim United States had a destiny expansion . Not so long United States did annexation Texas Republic into the Union, but John O'Sullivan’s phrase “Manifest Destiny” was not attracted many people. Until the second times, in 1845 John O'Sullivan used it on New York Morning News and he attracted big attention.
    “And that claim is by the right of our manifest destiny to overspread and to possess the whole of the continent which Providence has given us for...