| A | B |
| Square Deal | TR's domestic agenda and policies |
| Upton Sinclair | Investigative journalist who exposed the sickening conditions in the meatpacking industry with his book, The Jungle. |
| The Jungle | Book that inspired sweeping reforms in the meatpacking industry. |
| Theodore Roosevelt | Youngest president in US history. |
| Meat Inspection Act | Law creating strict cleanliness requirements for meatpackers and creating a program for federal meat inspection. |
| Pure Food and Drug Act | Law stopping the sale of contaminated foods and medicines and calling for truth in labeling. |
| conservation | The idea that some wilderness areas must be preserved and protected from development while other areas may be exploited for the common good. |
| NAACP | Organization established to gain equal rights for minorities. |
| WEB Du Bois | African-American leader who demanded immediate equality among the races. |
| Booker T Washington | African-American leader invited to dinner at the White House by TR. |
| "Boss" Platt | Leader of the New York Republican political machine |
| trustbusting | Practice of breaking up large companies that were operating against the "public good". |
| Interstate Commerce Act | Law designed to regulate railroads. |
| Yellowstone Park | First of the US National Parks |
| Gifford Pinchot | Appointed to head the US Forest Service in 1905. |
| John Muir | A naturalist and associate of TR who persuaded the president to set preserve 148 million acres of forest reserves. |