What new social/economic class of people formed during the second industrial revolution in the us?

During the Second Industrial Revolution in the United States, the Treaty of Guadalupe-Hidalgo in 1848 was formed. It is the unprecedented urbanization and rapid territorial expansion.  It is secured Mexican cession of the Southwest to the United States. This expansion competes the visions free-soilers, immigrants from Europe, and Industrial capitalists.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.