No "Americans" arrived in North America. However, in 10 A.D. Vikings explored the fringes of North America. Also, Native Americans crossed over from Siberia into Alaska over a land bridge about 12,000 years ago. In 1501, Amerigo Vespucci officially discovered America but thought it was Asia so he did not dock. Then in 1592, Christopher Columbus found and docked in the Caribbean and was the first man to land on America.
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The arts thrived during the reign of Queen Elizabeth.
Simple....as we learned Manifest Destiny was the belief that it was God's will that there be WESTWARD EXPANSION. This meaning that the US claiming more lands to the West was meant to be. This being said...it is logical to conclude that the admission of states to the Union would be met with enthusiasm.