- Justo L. González
- Abraham H. Maslow
- Steven E. Ozment
- Ivan Illich
- Magnus Magnusson
- Nancie Atwell
- Penny Lord
- Bob Lord
- Régine Pernoud
- Alex de Jonge
- Peter Ford
- Michael Howell
- J.G. Crowther
- Marie-Véronique Clin
- Thomas D. McGonigle
- Morton J. Golding
- Lee Palmer Wandel
- James F. Quigley
- Glenn T. Miller
- Russ Marion