Title: The unknown architects of civil rights
Subjects: Reconstruction (U.S. history, 1865-1877), Civil rights movements, Social aspects, Civil rights, History, African Americans, Social and political views
Places: United States
People: Ulysses S. Grant (1852-1929), Thaddeus Stevens (1792-1868), Charles Sumner (1811-1874)
Time periods: 20th century, 19th century