Progressive Era: A period of widespread social activism and political reform across the United States that spanned from the 1890s to the 1920s, which included Taft's presidency.
Trust-Busting: The government activities aimed at breaking up monopolies and trusts (corporations that control entire industries), an effort heavily associated with Taft's predecessor, Theodore Roosevelt, but also continued under Taft.
Dollar Diplomacy: A form of foreign policy promoted by President Taft where he encouraged businesses to invest money in areas of strategic interest to the U.S., particularly in Latin America and East Asia.