Final answer:
Manifest Destiny was the belief that it was the divine mission of the American people to spread their democratic ideals and way of life across the continent in the 19th century. It fueled westward expansion and acquisition of new territories, tied to the belief in American exceptionalism.
Step-by-step explanation:
The primary belief associated with Manifest Destiny during the 19th century in the United States was the idea that it was the divine mission of the American people to spread their democratic ideals and way of life across the continent. This belief fueled westward expansion and the acquisition of new territories, as Americans believed it was their destiny and duty to settle and govern these lands.
Manifest Destiny was also closely tied to the belief in American exceptionalism, the idea that the United States was uniquely chosen by God to serve as an example and leader among nations. Supporters of Manifest Destiny saw the United States as destined to bring progress, civilization, and democracy to the entire North American continent.
However, it's important to note that Manifest Destiny also had negative consequences, as it often led to the displacement, mistreatment, and violence against Native American tribes and other groups.
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