Industrial Revolution: The period of rapid industrialization and technological advancements from the late 18th to early 19th century that transformed manufacturing processes and led to economic growth.
Manifest Destiny: The belief prevalent in the 19th century that it was America's destiny or duty to expand its territory across the continent from coast to coast.
Great Migration: The movement of millions of African Americans from rural Southern states to urban Northern cities between 1910 and 1970 in search of better economic opportunities and freedom from Jim Crow laws.