What does the term "manifest destiny" refer to?

The term "manifest destiny" refers to the belief that it was both justified and inevitable for the United States to expand its territory across North America. This concept emerged in the 19th century and was used to rationalize the westward expansion of the United States, including the acquisition of lands such as Texas, Oregon, and California. Proponents of manifest destiny believed that it was America's divine right and duty to spread its values and way of life across the continent, often overlooking the rights and sovereignty of indigenous peoples and other nations. This idea played a significant role in shaping U.S. policies and attitudes during a period of significant territorial growth and conflict.