Progressive Era: A period of widespread social activism and political reform across the United States that spanned from the 1890s to the 1920s. The main objectives were eliminating problems caused by industrialization, urbanization, immigration, and corruption in government.
Conservation Movement: An early 20th-century movement aimed at preserving natural resources for sustainable use. This is akin to maintaining a balanced diet to ensure long-term health.
Trust-Busting: The governmental activity aimed at breaking up trusts or monopolies into smaller companies to promote competition. It's like dividing a large class into smaller groups so everyone gets an equal chance to participate.