Richard Gregg (social philosopher)
Richard Bartlett Gregg (1885–1974) was an American social philosopher said to be "the first American to develop a substantial theory of nonviolent resistance" and an influence on the thinking of Martin Luther King, Jr,  Aldous Huxley,  civil-rights theorist Bayard Rustin,  and pacifist and socialist reformer Jessie Wallace Hughan. Gregg's ideas also influenced the Peace Pledge Union in 1930s Britain, although by 1937 most of the PPU had moved away from Gregg's ideas.
After graduating from Scott and Helen Nearing.  Gregg was also author of other books, including The Compass of Civilization, and the essay The Value of Voluntary Simplicity (Wallingford, PA: Pendle Hill, 1936), a philosophical essay on the need and benefits of living more simply. He coined the term "voluntary simplicity".
- Kosek, Joseph Kip (March 2005). "Richard Gregg, Mohandas Gandhi, and the Strategy of Nonviolence". The
- Fox, Richard G. (January–February 1998). "Passage from India: How Westerners Rewrote Gandhi's Message".
- Ansbro, John J. (1982). Martin Luther King, Jr: The Making of a Mind. Orbis Books. pp. 146-7, 149.
- Huxley, Aldous and Baker Robert S.(ed.) (2002). Complete Essays, 1936-1938. Volume 4. I.R. Dee. pp. 240, 248. See also the reference to Gregg's The Power of Non-Violence in Huxley's Ends and Means (1937).
- Kosek, Joseph Kip. Richard Gregg,Mohandas Gandhi, and the Strategy of Nonviolence
- Bennett, Scott H. Radical Pacifism: the War Resisters League and Gandhian nonviolence in America, 1915-1963, Syracuse University Press, 2003, p. 47.
- Ceadel, Martin (1980). Pacifism in Britain, 1914-1945: The Defining of a Faith. Clarendon Press. pp. 250-257.
- Ceadel, p. 256.
- Richard Gregg, Mohandas Gandhi, and the Strategy of Nonviolence
- Lynd, Staughton. Nonviolence in America: a documentary history, Bobbs-Merrill, 1966, (pp. 271-296 reprint part of Gregg's pamphlet).
- Kosek, Joseph Kip.(2009) Acts of Conscience: Christian Nonviolence and Modern American Democracy Columbia University Press. pp. 224.
- Biography of Richard B. Gregg
- Bibliography of Richard B. Gregg
- The Value of Voluntary Simplicity
- with King's introductionThe Power of NonviolenceGreggs's
- Power of Non-ViolenceDiscussion of Gregg's
- Memorial Commentary on Richard B. Gregg (pdf)
- Richard Gregg materials in the South Asian American Digital Archive (SAADA)
- Finding aid to the Richard Bartlett Gregg papers at the University of Pennsylvania Libraries