For starters we would not as many states as we do now for one. Two, America's structure of government could have been different as well with out the people to be in the right place at the right time. Lastly, the gold/silver/coal rushes would not have been a big part for the industrial age. Also boom towns would maybe not have existed.
Answer:
Green land became a possession of Denmark in 1380.
Manifest destiny: A widely held belief in the 19th century United States that its settlers were given the divine right to expand across the continent.
