Progressive Era: A period from the late 19th century to the early 20th century marked by social reform movements aimed at addressing issues such as poverty, corruption, and inequality.
Civil Rights Movement: A series of social movements during the mid-20th century that sought to end racial segregation and discrimination against African Americans.
Women's Suffrage Movement: The fight for women's right to vote, which gained significant momentum during the late 19th and early 20th centuries.