Which belief was central to Manifest Destiny?

The belief central to Manifest Destiny was the justification for territorial expansion. This idea emerged in the 19th century as Americans felt it was their divine right and duty to expand the nation from the Atlantic to the Pacific. Manifest Destiny was rooted in the belief that the United States had a responsibility to spread democracy and capitalism across the continent. This philosophy not only fueled the westward expansion but also played a significant role in the annexation of territories such as Texas and the Oregon Trail, and the acquisition of land through treaties and conflicts with other countries and indigenous peoples.

While the notion of cultural superiority did play a role in the justification of expansion, it was primarily used to rationalize territorial acquisitions rather than as the core belief of Manifest Destiny itself. The other options present ideas that, while relevant to different contexts, do not capture the essence of the underlying rationale for Manifest Destiny, which was predominantly focused on the expansion of U.S. territory and influence.