What theme best describes american history after 1877

Manifest destiny

Explanation:

The Manifest Destiny was the idea of the Americans that they believed that the Americans were destined by God to conquer and rule the North American continent. It was coined in 1845 and was the philosophy that Americans were supposed to expand its territories. 

i believe it was the shinto

copernicus finished the first manuscript of his book, "de revolutionibus orbium coelestium" ("on the revolutions of the heavenly spheres") in 1532. in it, copernicus established that the planets orbited the sun rather than the earth. he laid out his model of the solar system and the path of the planets.