The document discusses key people and events of the Progressive Era in the United States between 1890-1920. It defines muckrakers as journalists who exposed corruption and fought for reform, and identifies Ida Tarbell, Upton Sinclair, and Cary Nation as prominent muckrakers. It also discusses W.E.B. Du Bois and Booker T. Washington as influential African American reformers with differing philosophies on achieving racial equality and political rights. Theodore Roosevelt is noted for believing the president should be an active referee between big business and the people.