Answer:
Manifest destiny was a widely held cultural belief in the 19th-century United States that American settlers were destined to expand across North America. There are three basic themes to manifest destiny: ... The mission of the United States to redeem and remake the west in the image of the agrarian East.
Geographic, physical and social factors. Geographic factors such as location, Physical factors such as mountains , rivers, lakes, etc. and socail factors such as language, culture, customs, etc.
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They were the most ruthless and radical political groups that created fear during the Reign of Terror. Fear how? From democratic initiatives to public violence.