How did the concept of manifest destiny contribute to American expansion

Expansion to turn into the unified country of fifty states. 2. (Manifest Destiny) with a significant increase came the idea of Manifest Destiny. Manifest Destiny is from these concepts that Americans were intended to extend their limits over large amounts of land. It was the thought presented by John C. Sullivan. Some of these United States people were immigrants that fell to the United States at the search for the first start. This idea of Manifest Destiny played a big roll in the increase of this nation to the