What is the importance of Manifest Destiny in the United States history.How important is it as a concept that defines us as a people? Why? Offer...

Manifest Destiny has been a major force in US history.  It was very important in causing the expansion of the US in the 1800s.

Let's define it as the idea that A) America and American civilization should take control of as much land as possible and B) that this should be done because Americans had a culture and government that were superior to those of the people around them.

The major impacts of the concept were the expansion across America (the "winning of the West") and the Mexican-American War.

Does it define us as a people?  It certainly defined us during those years.  We used it as a justification for taking land from the less-developed people -- the Indians and the Mexicans and then overseas places such as the Philippines.

The idea that we should spread our ways (if not our actual control) to other people and other parts of the world is part of what has caused us to do things like invade Iraq in modern times.