- Mihaly Csikszentmihalyi
- Irvin D. Yalom
- Studs Terkel
- Martin E.P. Seligman
- Marilyn Bates
- Rollo May
- Abraham H. Maslow
- Henry Mintzberg
- Thomas Gilovich
- Alfred Adler
- Gary Belsky
- Peter Watson
- Paul Alexander
- Dacher Keltner
- Josef Pieper
- Geert Hofstede
- Joanne B. Ciulla
- Bertell Ollman
- Michael Argyle
- Fritz Pappenheim