Answer:
Manifest Destiny was the idea that Americans, that is to say, the United States, had the right to expand to the West, and reach the Pacific Ocean: occupy the lands in between, and spread American values.
It also applies to other parts of the world in a more indirect way, especially Latin America.
The settlement of the West was aided both by economic necessity, because many migrants were arriving in the United States seeking for cheap land, and also by ideology, and the ideology was precisely that of Manifest Destiny.
While at the drive-in Two-Bit sneaks behind Johnny puts his hands on both of their shoulders and said, "Okay, greasers, you've had it!" Johnny had recently been jumped by a gang of Soc and is still traumatized by the experience
Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians. Europeans were used to these diseases, but Indian people had no resistance to them.
Jim crow laws, didn't allow them to vote
Lodge sabotaged the League covenant by declaring the United States exempt from Article X. He attached reservations, or amendments, to the treaty to this effect. Wilson, bedridden from a debilitating stroke, was unable to accept these changes. He asked Senate Democrats to vote against the Treaty of Versailles unless the Lodge reservations were dropped. Neither side budged, and the treaty went down to defeat.
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