The document outlines the historical context of immigration in the U.S. from the Gilded Age to the early 20th century, focusing on the differences between old and new immigrants, nativism, and significant legislation like the Chinese Exclusion Act and the National Origins Act. It also explores the rise of the populist movement, labor unions, and key reformers, as well as notable events that illustrate the struggles for workers' rights and social justice. Alongside, it discusses influential figures such as Theodore Roosevelt, Booker T. Washington, and W.E.B. Du Bois, highlighting their contributions to progressivism and civil rights.