Early 20th Century:
Name |
Period |
Category |
Organization Affiliation |
| Baden-Powell | early 20th | Author, Adv. Ed | Boy Scouts |
| Boyce, W.D. | early 20th | Practitioner | Boy Scouts USA |
| Dewey, John | early 20th | Author, Philosopher | |
| Hahn, Kurt | early 20th | Adv. Ed, Teacher | Outward Bound |
| James, William | early 20th | Philosopher | |
| Mason, Charlotte | 19th century | Teacher, Author | |
| Whitehead, Alfred North | early 20th | Author, Teacher, Philosopher | |
| Williams, George | 19th century | Organizer | YMCA |