- Siddhartha Gautama (The Buddha)
- Cesar Estrada Chavez
- Khan Abdul Ghaffar Khan
- Dorothy Day
- Nelson Rolihlahla Mandela
- Archbishop Desmond Tutu
- Jalāl ad-Dīn Muḥammad Balkhī (Rumi)
- Albert Einstein
- Jane Addams
- Jiddu Krishnamurti
- John Lewis
- Jesus of Nazareth
- Vinoba Bhave
- Sojourner Truth
- Aung San Suu Kyi
- Edith Stein
- Chief Joseph
- Mohandas Karamchand Gandhi
- Rabindranath Tagore
- Abraham Joshua Heschel
- Albert Schweitzer
- Jane Goodall
- Wangari Muta Maathai
- Karol Jozef Wojtyla (Pope John Paul II)
- Giovanni Francesco di Bernardone (St. Francis of Assisi)
- Paul of Tarsus (St. Paul)
- Agnes Gouxha Bojaxhiu (Mother Theresa)
- Khwāja Shamsu d-Dīn Muhammad Hāfez-e Shīrāzī (Hāfez)
- Lev Nikolayevich Tolstoy
- Susan B. Anthony
- Howard Thurman
- George Fox
- Aleksandr Isayevich Solzhenitsyn
- Mahāvīra
- John Dear
- Tenzin Gyatso (The Dali Lama)
- Kahlil Gibran
- William Wilberforce
- King Ashoka
- John Woolman
- John Muir
- Vadana Shiva
- Leymah Gbowee
- Sister Helen Prejean
- Julia Butterfly Hill
- Martin Luther King, Jr.
- Archbishop Oscar Romero
- Swami Vivekananda
- Henry David Thoreau
- Robert Nesta “Bob” Marley
- Thich Nhat Hanh
- Lanza del Vasto
- Mírzá Ḥusayn-`Alí Núrí (Bahá’u’lláh)
- Thomas Merton
- Chief Black Kettle
Environmental Justice through Active Nonviolence