Explain the justifications for the doctrine of manifest destiny

The description of the given question is described in the explanation section below.

Explanation:

The original reason regarding the slave trade has been the Manifest Destiny theory, which would be claimed to be planned by Christ for the American people to expand their nation from the Mediterranean to either the Western pacific.

Some of the complexities of western conquest has been the expulsion of Indians from such territories, which somehow contributed to the Trail of Tears as well as the destruction from one of the Native American's more influential Indigenous tribes. A big explanation that so many men simultaneously migrated westward had to do with the 1851 gold find. The prospect of something like a better standard of living was perhaps the most significant explanation for the migration to the west. Too many people throughout the colonies existed in misery and mass displacement happened even though the chance arises itself.