Industrialization: The process of developing industries on a large scale, which was a significant continuity from the Gilded Age into the Progressive Era and beyond.
Women's Suffrage Movement: The fight for women's right to vote, which began in the Progressive Era and achieved success with the passage of the 19th Amendment during the Roaring Twenties.
Red Scare: A period of intense anti-communist sentiment and fear in the United States following World War I that continued into the Roaring Twenties.