'Manifest' means clarity in mind and destiny means forthcoming events. US believed that it is the chosen country by the will of god to show the rest of the world that a federated Government would be reined supreme.
Step-by-step explanation:
Manifest is not a single ideology whereas it combines American exceptionalism, nationalism, expansionists approach and racism. Americans believe that Manifest destiny would confer good to the territory making its people civilized. Louisiana purchase enabled US to purchase many thousand miles of territory which expanded United states by three fourth and the next manifest destiny accomplishment is the lands which were usurped from Mexico during the US and Mexican war. The same dictum is written by Rudyard Kipling which
The effects of westward expansion was mostly felt by the Native Americans who were forced to migrate to south ward leaving their lands and livestock. Many European settlers migrated to west of US and the animal resources became low due to this huge settlements. Indigenous people were not civilized or literates which made them to sign the treaties that asked for the surrender if the lands.