What is important about the progressive dates on the manifest destiny map?

The phrase, coined by a newspaper writer in the 1840s, implied that it was the obvious path of the United States to expand its territory as far westward as possible—the right and appropriate fate of the country. ... The map represents the old Manifest Destiny.

Hawaii was the final state

Communicating with the dead was common, it wasn’t seen as bizarre or weird,” explains murch. “it’s hard to imagine that now, we look at that and think, ‘why are you opening the gates of hell? ’